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frontend/node_modules/@turf/polygonize/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2017 TurfJS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

frontend/node_modules/@turf/polygonize/README.md

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+# @turf/polygonize
+
+<!-- Generated by documentation.js. Update this documentation by updating the source code. -->
+
+## polygonize
+
+Polygonizes [(Multi)LineString(s)][1] into [Polygons][2].
+
+Implementation of GEOSPolygonize function (`geos::operation::polygonize::Polygonizer`).
+
+Polygonizes a set of lines that represents edges in a planar graph. Edges must be correctly
+noded, i.e., they must only meet at their endpoints.
+
+The implementation correctly handles:
+
+-   Dangles: edges which have one or both ends which are not incident on another edge endpoint.
+-   Cut Edges (bridges): edges that are connected at both ends but which do not form part of a polygon.
+
+**Parameters**
+
+-   `geoJson` **([FeatureCollection][3] \| [Geometry][4] \| [Feature][5]&lt;([LineString][6] \| [MultiLineString][7])>)** Lines in order to polygonize
+
+
+-   Throws **[Error][8]** if geoJson is invalid.
+
+Returns **[FeatureCollection][3]&lt;[Polygon][9]>** Polygons created
+
+[1]: https://tools.ietf.org/html/rfc7946#section-3.1.4
+
+[2]: https://tools.ietf.org/html/rfc7946#section-3.1.6
+
+[3]: https://tools.ietf.org/html/rfc7946#section-3.3
+
+[4]: https://tools.ietf.org/html/rfc7946#section-3.1
+
+[5]: https://tools.ietf.org/html/rfc7946#section-3.2
+
+[6]: https://tools.ietf.org/html/rfc7946#section-3.1.4
+
+[7]: https://tools.ietf.org/html/rfc7946#section-3.1.5
+
+[8]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Error
+
+[9]: https://tools.ietf.org/html/rfc7946#section-3.1.6
+
+<!-- This file is automatically generated. Please don't edit it directly:
+if you find an error, edit the source file (likely index.js), and re-run
+./scripts/generate-readmes in the turf project. -->
+
+---
+
+This module is part of the [Turfjs project](http://turfjs.org/), an open source
+module collection dedicated to geographic algorithms. It is maintained in the
+[Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create
+PRs and issues.
+
+### Installation
+
+Install this module individually:
+
+```sh
+$ npm install @turf/polygonize
+```
+
+Or install the Turf module that includes it as a function:
+
+```sh
+$ npm install @turf/turf
+```

frontend/node_modules/@turf/polygonize/dist/es/index.js

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+import { featureCollection } from "@turf/helpers";
+import Graph from "./lib/Graph.js";
+import EdgeRing from "./lib/EdgeRing.js";
+/**
+ * Polygonizes {@link LineString|(Multi)LineString(s)} into {@link Polygons}.
+ *
+ * Implementation of GEOSPolygonize function (`geos::operation::polygonize::Polygonizer`).
+ *
+ * Polygonizes a set of lines that represents edges in a planar graph. Edges must be correctly
+ * noded, i.e., they must only meet at their endpoints.
+ *
+ * The implementation correctly handles:
+ *
+ * - Dangles: edges which have one or both ends which are not incident on another edge endpoint.
+ * - Cut Edges (bridges): edges that are connected at both ends but which do not form part of a polygon.
+ *
+ * @name polygonize
+ * @param {FeatureCollection|Geometry|Feature<LineString|MultiLineString>} geoJson Lines in order to polygonize
+ * @returns {FeatureCollection<Polygon>} Polygons created
+ * @throws {Error} if geoJson is invalid.
+ */
+export default function polygonize(geoJson) {
+    var graph = Graph.fromGeoJson(geoJson);
+    // 1. Remove dangle node
+    graph.deleteDangles();
+    // 2. Remove cut-edges (bridge edges)
+    graph.deleteCutEdges();
+    // 3. Get all holes and shells
+    var holes = [], shells = [];
+    graph
+        .getEdgeRings()
+        .filter(function (edgeRing) { return edgeRing.isValid(); })
+        .forEach(function (edgeRing) {
+        if (edgeRing.isHole())
+            holes.push(edgeRing);
+        else
+            shells.push(edgeRing);
+    });
+    // 4. Assign Holes to Shells
+    holes.forEach(function (hole) {
+        if (EdgeRing.findEdgeRingContaining(hole, shells))
+            shells.push(hole);
+    });
+    // 5. EdgeRings to Polygons
+    return featureCollection(shells.map(function (shell) { return shell.toPolygon(); }));
+}

frontend/node_modules/@turf/polygonize/dist/es/lib/Edge.js

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+import { lineString } from "@turf/helpers";
+import { orientationIndex } from "./util.js";
+/**
+ * This class is inspired by GEOS's geos::operation::polygonize::PolygonizeDirectedEdge
+ */
+var Edge = /** @class */ (function () {
+    /**
+     * @param {Node} from - start node of the Edge
+     * @param {Node} to - end node of the edge
+     */
+    function Edge(from, to) {
+        this.from = from; //< start
+        this.to = to; //< End
+        this.next = undefined; //< The edge to be computed after
+        this.label = undefined; //< Used in order to detect Cut Edges (Bridges)
+        this.symetric = undefined; //< The symetric edge of this
+        this.ring = undefined; //< EdgeRing in which the Edge is
+        this.from.addOuterEdge(this);
+        this.to.addInnerEdge(this);
+    }
+    /**
+     * Creates or get the symetric Edge.
+     *
+     * @returns {Edge} - Symetric Edge.
+     */
+    Edge.prototype.getSymetric = function () {
+        if (!this.symetric) {
+            this.symetric = new Edge(this.to, this.from);
+            this.symetric.symetric = this;
+        }
+        return this.symetric;
+    };
+    /**
+     * Removes edge from from and to nodes.
+     */
+    Edge.prototype.deleteEdge = function () {
+        this.from.removeOuterEdge(this);
+        this.to.removeInnerEdge(this);
+    };
+    /**
+     * Compares Edge equallity.
+     *
+     * An edge is equal to another, if the from and to nodes are the same.
+     *
+     * @param {Edge} edge - Another Edge
+     * @returns {boolean} - True if Edges are equal, False otherwise
+     */
+    Edge.prototype.isEqual = function (edge) {
+        return this.from.id === edge.from.id && this.to.id === edge.to.id;
+    };
+    Edge.prototype.toString = function () {
+        return "Edge { " + this.from.id + " -> " + this.to.id + " }";
+    };
+    /**
+     * Returns a LineString representation of the Edge
+     *
+     * @returns {Feature<LineString>} - LineString representation of the Edge
+     */
+    Edge.prototype.toLineString = function () {
+        return lineString([this.from.coordinates, this.to.coordinates]);
+    };
+    /**
+     * Comparator of two edges.
+     *
+     * Implementation of geos::planargraph::DirectedEdge::compareTo.
+     *
+     * @param {Edge} edge - Another edge to compare with this one
+     * @returns {number} -1 if this Edge has a greater angle with the positive x-axis than b,
+     *          0 if the Edges are colinear,
+     *          1 otherwise
+     */
+    Edge.prototype.compareTo = function (edge) {
+        return orientationIndex(edge.from.coordinates, edge.to.coordinates, this.to.coordinates);
+    };
+    return Edge;
+}());
+export default Edge;

frontend/node_modules/@turf/polygonize/dist/es/lib/EdgeRing.js

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+import { orientationIndex, envelopeIsEqual, envelopeContains, coordinatesEqual, } from "./util.js";
+import { multiPoint, polygon, point, } from "@turf/helpers";
+import envelope from "@turf/envelope";
+import booleanPointInPolygon from "@turf/boolean-point-in-polygon";
+/**
+ * Ring of edges which form a polygon.
+ *
+ * The ring may be either an outer shell or a hole.
+ *
+ * This class is inspired in GEOS's geos::operation::polygonize::EdgeRing
+ */
+var EdgeRing = /** @class */ (function () {
+    function EdgeRing() {
+        this.edges = [];
+        this.polygon = undefined; //< Caches Polygon representation
+        this.envelope = undefined; //< Caches Envelope representation
+    }
+    /**
+     * Add an edge to the ring, inserting it in the last position.
+     *
+     * @memberof EdgeRing
+     * @param {Edge} edge - Edge to be inserted
+     */
+    EdgeRing.prototype.push = function (edge) {
+        this.edges.push(edge);
+        this.polygon = this.envelope = undefined;
+    };
+    /**
+     * Get Edge.
+     *
+     * @memberof EdgeRing
+     * @param {number} i - Index
+     * @returns {Edge} - Edge in the i position
+     */
+    EdgeRing.prototype.get = function (i) {
+        return this.edges[i];
+    };
+    Object.defineProperty(EdgeRing.prototype, "length", {
+        /**
+         * Getter of length property.
+         *
+         * @memberof EdgeRing
+         * @returns {number} - Length of the edge ring.
+         */
+        get: function () {
+            return this.edges.length;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    /**
+     * Similar to Array.prototype.forEach for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.forEach
+     */
+    EdgeRing.prototype.forEach = function (f) {
+        this.edges.forEach(f);
+    };
+    /**
+     * Similar to Array.prototype.map for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.map
+     * @returns {Array} - The mapped values in the function
+     */
+    EdgeRing.prototype.map = function (f) {
+        return this.edges.map(f);
+    };
+    /**
+     * Similar to Array.prototype.some for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.some
+     * @returns {boolean} - True if an Edge check the condition
+     */
+    EdgeRing.prototype.some = function (f) {
+        return this.edges.some(f);
+    };
+    /**
+     * Check if the ring is valid in geomtry terms.
+     *
+     * A ring must have either 0 or 4 or more points. The first and the last must be
+     * equal (in 2D)
+     * geos::geom::LinearRing::validateConstruction
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - Validity of the EdgeRing
+     */
+    EdgeRing.prototype.isValid = function () {
+        // TODO: stub
+        return true;
+    };
+    /**
+     * Tests whether this ring is a hole.
+     *
+     * A ring is a hole if it is oriented counter-clockwise.
+     * Similar implementation of geos::algorithm::CGAlgorithms::isCCW
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - true: if it is a hole
+     */
+    EdgeRing.prototype.isHole = function () {
+        var _this = this;
+        // XXX: Assuming Ring is valid
+        // Find highest point
+        var hiIndex = this.edges.reduce(function (high, edge, i) {
+            if (edge.from.coordinates[1] > _this.edges[high].from.coordinates[1])
+                high = i;
+            return high;
+        }, 0), iPrev = (hiIndex === 0 ? this.length : hiIndex) - 1, iNext = (hiIndex + 1) % this.length, disc = orientationIndex(this.edges[iPrev].from.coordinates, this.edges[hiIndex].from.coordinates, this.edges[iNext].from.coordinates);
+        if (disc === 0)
+            return (this.edges[iPrev].from.coordinates[0] >
+                this.edges[iNext].from.coordinates[0]);
+        return disc > 0;
+    };
+    /**
+     * Creates a MultiPoint representing the EdgeRing (discarts edges directions).
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<MultiPoint>} - Multipoint representation of the EdgeRing
+     */
+    EdgeRing.prototype.toMultiPoint = function () {
+        return multiPoint(this.edges.map(function (edge) { return edge.from.coordinates; }));
+    };
+    /**
+     * Creates a Polygon representing the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - Polygon representation of the Edge Ring
+     */
+    EdgeRing.prototype.toPolygon = function () {
+        if (this.polygon)
+            return this.polygon;
+        var coordinates = this.edges.map(function (edge) { return edge.from.coordinates; });
+        coordinates.push(this.edges[0].from.coordinates);
+        return (this.polygon = polygon([coordinates]));
+    };
+    /**
+     * Calculates the envelope of the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - envelope
+     */
+    EdgeRing.prototype.getEnvelope = function () {
+        if (this.envelope)
+            return this.envelope;
+        return (this.envelope = envelope(this.toPolygon()));
+    };
+    /**
+     * `geos::operation::polygonize::EdgeRing::findEdgeRingContaining`
+     *
+     * @param {EdgeRing} testEdgeRing - EdgeRing to look in the list
+     * @param {EdgeRing[]} shellList - List of EdgeRing in which to search
+     *
+     * @returns {EdgeRing} - EdgeRing which contains the testEdgeRing
+     */
+    EdgeRing.findEdgeRingContaining = function (testEdgeRing, shellList) {
+        var testEnvelope = testEdgeRing.getEnvelope();
+        var minEnvelope, minShell;
+        shellList.forEach(function (shell) {
+            var tryEnvelope = shell.getEnvelope();
+            if (minShell)
+                minEnvelope = minShell.getEnvelope();
+            // the hole envelope cannot equal the shell envelope
+            if (envelopeIsEqual(tryEnvelope, testEnvelope))
+                return;
+            if (envelopeContains(tryEnvelope, testEnvelope)) {
+                var testEdgeRingCoordinates = testEdgeRing.map(function (edge) { return edge.from.coordinates; });
+                var testPoint = void 0;
+                var _loop_1 = function (pt) {
+                    if (!shell.some(function (edge) { return coordinatesEqual(pt, edge.from.coordinates); })) {
+                        testPoint = pt;
+                    }
+                };
+                for (var _i = 0, testEdgeRingCoordinates_1 = testEdgeRingCoordinates; _i < testEdgeRingCoordinates_1.length; _i++) {
+                    var pt = testEdgeRingCoordinates_1[_i];
+                    _loop_1(pt);
+                }
+                if (testPoint && shell.inside(point(testPoint))) {
+                    if (!minShell || envelopeContains(minEnvelope, tryEnvelope))
+                        minShell = shell;
+                }
+            }
+        });
+        return minShell;
+    };
+    /**
+     * Checks if the point is inside the edgeRing
+     *
+     * @param {Feature<Point>} pt - Point to check if it is inside the edgeRing
+     * @returns {boolean} - True if it is inside, False otherwise
+     */
+    EdgeRing.prototype.inside = function (pt) {
+        return booleanPointInPolygon(pt, this.toPolygon());
+    };
+    return EdgeRing;
+}());
+export default EdgeRing;

frontend/node_modules/@turf/polygonize/dist/es/lib/Graph.js

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+import Node from "./Node.js";
+import Edge from "./Edge.js";
+import EdgeRing from "./EdgeRing.js";
+import { flattenEach, coordReduce } from "@turf/meta";
+import { featureOf } from "@turf/invariant";
+/**
+ * Validates the geoJson.
+ *
+ * @param {GeoJSON} geoJson - input geoJson.
+ * @throws {Error} if geoJson is invalid.
+ */
+function validateGeoJson(geoJson) {
+    if (!geoJson)
+        throw new Error("No geojson passed");
+    if (geoJson.type !== "FeatureCollection" &&
+        geoJson.type !== "GeometryCollection" &&
+        geoJson.type !== "MultiLineString" &&
+        geoJson.type !== "LineString" &&
+        geoJson.type !== "Feature")
+        throw new Error("Invalid input type '" + geoJson.type + "'. Geojson must be FeatureCollection, GeometryCollection, LineString, MultiLineString or Feature");
+}
+/**
+ * Represents a planar graph of edges and nodes that can be used to compute a polygonization.
+ *
+ * Although, this class is inspired by GEOS's `geos::operation::polygonize::PolygonizeGraph`,
+ * it isn't a rewrite. As regards algorithm, this class implements the same logic, but it
+ * isn't a javascript transcription of the C++ source.
+ *
+ * This graph is directed (both directions are created)
+ */
+var Graph = /** @class */ (function () {
+    function Graph() {
+        this.edges = []; //< {Edge[]} dirEdges
+        // The key is the `id` of the Node (ie: coordinates.join(','))
+        this.nodes = {};
+    }
+    /**
+     * Creates a graph from a GeoJSON.
+     *
+     * @param {FeatureCollection<LineString>} geoJson - it must comply with the restrictions detailed in the index
+     * @returns {Graph} - The newly created graph
+     * @throws {Error} if geoJson is invalid.
+     */
+    Graph.fromGeoJson = function (geoJson) {
+        validateGeoJson(geoJson);
+        var graph = new Graph();
+        flattenEach(geoJson, function (feature) {
+            featureOf(feature, "LineString", "Graph::fromGeoJson");
+            // When a LineString if formed by many segments, split them
+            coordReduce(feature, function (prev, cur) {
+                if (prev) {
+                    var start = graph.getNode(prev), end = graph.getNode(cur);
+                    graph.addEdge(start, end);
+                }
+                return cur;
+            });
+        });
+        return graph;
+    };
+    /**
+     * Creates or get a Node.
+     *
+     * @param {number[]} coordinates - Coordinates of the node
+     * @returns {Node} - The created or stored node
+     */
+    Graph.prototype.getNode = function (coordinates) {
+        var id = Node.buildId(coordinates);
+        var node = this.nodes[id];
+        if (!node)
+            node = this.nodes[id] = new Node(coordinates);
+        return node;
+    };
+    /**
+     * Adds an Edge and its symetricall.
+     *
+     * Edges are added symetrically, i.e.: we also add its symetric
+     *
+     * @param {Node} from - Node which starts the Edge
+     * @param {Node} to - Node which ends the Edge
+     */
+    Graph.prototype.addEdge = function (from, to) {
+        var edge = new Edge(from, to), symetricEdge = edge.getSymetric();
+        this.edges.push(edge);
+        this.edges.push(symetricEdge);
+    };
+    /**
+     * Removes Dangle Nodes (nodes with grade 1).
+     */
+    Graph.prototype.deleteDangles = function () {
+        var _this = this;
+        Object.keys(this.nodes)
+            .map(function (id) { return _this.nodes[id]; })
+            .forEach(function (node) { return _this._removeIfDangle(node); });
+    };
+    /**
+     * Check if node is dangle, if so, remove it.
+     *
+     * It calls itself recursively, removing a dangling node might cause another dangling node
+     *
+     * @param {Node} node - Node to check if it's a dangle
+     */
+    Graph.prototype._removeIfDangle = function (node) {
+        var _this = this;
+        // As edges are directed and symetrical, we count only innerEdges
+        if (node.innerEdges.length <= 1) {
+            var outerNodes = node.getOuterEdges().map(function (e) { return e.to; });
+            this.removeNode(node);
+            outerNodes.forEach(function (n) { return _this._removeIfDangle(n); });
+        }
+    };
+    /**
+     * Delete cut-edges (bridge edges).
+     *
+     * The graph will be traversed, all the edges will be labeled according the ring
+     * in which they are. (The label is a number incremented by 1). Edges with the same
+     * label are cut-edges.
+     */
+    Graph.prototype.deleteCutEdges = function () {
+        var _this = this;
+        this._computeNextCWEdges();
+        this._findLabeledEdgeRings();
+        // Cut-edges (bridges) are edges where both edges have the same label
+        this.edges.forEach(function (edge) {
+            if (edge.label === edge.symetric.label) {
+                _this.removeEdge(edge.symetric);
+                _this.removeEdge(edge);
+            }
+        });
+    };
+    /**
+     * Set the `next` property of each Edge.
+     *
+     * The graph will be transversed in a CW form, so, we set the next of the symetrical edge as the previous one.
+     * OuterEdges are sorted CCW.
+     *
+     * @param {Node} [node] - If no node is passed, the function calls itself for every node in the Graph
+     */
+    Graph.prototype._computeNextCWEdges = function (node) {
+        var _this = this;
+        if (typeof node === "undefined") {
+            Object.keys(this.nodes).forEach(function (id) {
+                return _this._computeNextCWEdges(_this.nodes[id]);
+            });
+        }
+        else {
+            node.getOuterEdges().forEach(function (edge, i) {
+                node.getOuterEdge((i === 0 ? node.getOuterEdges().length : i) - 1).symetric.next = edge;
+            });
+        }
+    };
+    /**
+     * Computes the next edge pointers going CCW around the given node, for the given edgering label.
+     *
+     * This algorithm has the effect of converting maximal edgerings into minimal edgerings
+     *
+     * XXX: method literally transcribed from `geos::operation::polygonize::PolygonizeGraph::computeNextCCWEdges`,
+     * could be written in a more javascript way.
+     *
+     * @param {Node} node - Node
+     * @param {number} label - Ring's label
+     */
+    Graph.prototype._computeNextCCWEdges = function (node, label) {
+        var edges = node.getOuterEdges();
+        var firstOutDE, prevInDE;
+        for (var i = edges.length - 1; i >= 0; --i) {
+            var de = edges[i], sym = de.symetric, outDE = void 0, inDE = void 0;
+            if (de.label === label)
+                outDE = de;
+            if (sym.label === label)
+                inDE = sym;
+            if (!outDE || !inDE)
+                // This edge is not in edgering
+                continue;
+            if (inDE)
+                prevInDE = inDE;
+            if (outDE) {
+                if (prevInDE) {
+                    prevInDE.next = outDE;
+                    prevInDE = undefined;
+                }
+                if (!firstOutDE)
+                    firstOutDE = outDE;
+            }
+        }
+        if (prevInDE)
+            prevInDE.next = firstOutDE;
+    };
+    /**
+     * Finds rings and labels edges according to which rings are.
+     *
+     * The label is a number which is increased for each ring.
+     *
+     * @returns {Edge[]} edges that start rings
+     */
+    Graph.prototype._findLabeledEdgeRings = function () {
+        var edgeRingStarts = [];
+        var label = 0;
+        this.edges.forEach(function (edge) {
+            if (edge.label >= 0)
+                return;
+            edgeRingStarts.push(edge);
+            var e = edge;
+            do {
+                e.label = label;
+                e = e.next;
+            } while (!edge.isEqual(e));
+            label++;
+        });
+        return edgeRingStarts;
+    };
+    /**
+     * Computes the EdgeRings formed by the edges in this graph.
+     *
+     * @returns {EdgeRing[]} - A list of all the EdgeRings in the graph.
+     */
+    Graph.prototype.getEdgeRings = function () {
+        var _this = this;
+        this._computeNextCWEdges();
+        // Clear labels
+        this.edges.forEach(function (edge) {
+            edge.label = undefined;
+        });
+        this._findLabeledEdgeRings().forEach(function (edge) {
+            // convertMaximalToMinimalEdgeRings
+            _this._findIntersectionNodes(edge).forEach(function (node) {
+                _this._computeNextCCWEdges(node, edge.label);
+            });
+        });
+        var edgeRingList = [];
+        // find all edgerings
+        this.edges.forEach(function (edge) {
+            if (edge.ring)
+                return;
+            edgeRingList.push(_this._findEdgeRing(edge));
+        });
+        return edgeRingList;
+    };
+    /**
+     * Find all nodes in a Maxima EdgeRing which are self-intersection nodes.
+     *
+     * @param {Node} startEdge - Start Edge of the Ring
+     * @returns {Node[]} - intersection nodes
+     */
+    Graph.prototype._findIntersectionNodes = function (startEdge) {
+        var intersectionNodes = [];
+        var edge = startEdge;
+        var _loop_1 = function () {
+            // getDegree
+            var degree = 0;
+            edge.from.getOuterEdges().forEach(function (e) {
+                if (e.label === startEdge.label)
+                    ++degree;
+            });
+            if (degree > 1)
+                intersectionNodes.push(edge.from);
+            edge = edge.next;
+        };
+        do {
+            _loop_1();
+        } while (!startEdge.isEqual(edge));
+        return intersectionNodes;
+    };
+    /**
+     * Get the edge-ring which starts from the provided Edge.
+     *
+     * @param {Edge} startEdge - starting edge of the edge ring
+     * @returns {EdgeRing} - EdgeRing which start Edge is the provided one.
+     */
+    Graph.prototype._findEdgeRing = function (startEdge) {
+        var edge = startEdge;
+        var edgeRing = new EdgeRing();
+        do {
+            edgeRing.push(edge);
+            edge.ring = edgeRing;
+            edge = edge.next;
+        } while (!startEdge.isEqual(edge));
+        return edgeRing;
+    };
+    /**
+     * Removes a node from the Graph.
+     *
+     * It also removes edges asociated to that node
+     * @param {Node} node - Node to be removed
+     */
+    Graph.prototype.removeNode = function (node) {
+        var _this = this;
+        node.getOuterEdges().forEach(function (edge) { return _this.removeEdge(edge); });
+        node.innerEdges.forEach(function (edge) { return _this.removeEdge(edge); });
+        delete this.nodes[node.id];
+    };
+    /**
+     * Remove edge from the graph and deletes the edge.
+     *
+     * @param {Edge} edge - Edge to be removed
+     */
+    Graph.prototype.removeEdge = function (edge) {
+        this.edges = this.edges.filter(function (e) { return !e.isEqual(edge); });
+        edge.deleteEdge();
+    };
+    return Graph;
+}());
+export default Graph;

frontend/node_modules/@turf/polygonize/dist/es/lib/Node.js

@@ -0,0 +1,93 @@
+import { orientationIndex } from "./util.js";
+/**
+ * Node
+ */
+var Node = /** @class */ (function () {
+    function Node(coordinates) {
+        this.id = Node.buildId(coordinates);
+        this.coordinates = coordinates; //< {Number[]}
+        this.innerEdges = []; //< {Edge[]}
+        // We wil store to (out) edges in an CCW order as geos::planargraph::DirectedEdgeStar does
+        this.outerEdges = []; //< {Edge[]}
+        this.outerEdgesSorted = false; //< {Boolean} flag that stores if the outer Edges had been sorted
+    }
+    Node.buildId = function (coordinates) {
+        return coordinates.join(",");
+    };
+    Node.prototype.removeInnerEdge = function (edge) {
+        this.innerEdges = this.innerEdges.filter(function (e) { return e.from.id !== edge.from.id; });
+    };
+    Node.prototype.removeOuterEdge = function (edge) {
+        this.outerEdges = this.outerEdges.filter(function (e) { return e.to.id !== edge.to.id; });
+    };
+    /**
+     * Outer edges are stored CCW order.
+     *
+     * @memberof Node
+     * @param {Edge} edge - Edge to add as an outerEdge.
+     */
+    Node.prototype.addOuterEdge = function (edge) {
+        this.outerEdges.push(edge);
+        this.outerEdgesSorted = false;
+    };
+    /**
+     * Sorts outer edges in CCW way.
+     *
+     * @memberof Node
+     * @private
+     */
+    Node.prototype.sortOuterEdges = function () {
+        var _this = this;
+        if (!this.outerEdgesSorted) {
+            //this.outerEdges.sort((a, b) => a.compareTo(b));
+            // Using this comparator in order to be deterministic
+            this.outerEdges.sort(function (a, b) {
+                var aNode = a.to, bNode = b.to;
+                if (aNode.coordinates[0] - _this.coordinates[0] >= 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] < 0)
+                    return 1;
+                if (aNode.coordinates[0] - _this.coordinates[0] < 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] >= 0)
+                    return -1;
+                if (aNode.coordinates[0] - _this.coordinates[0] === 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] === 0) {
+                    if (aNode.coordinates[1] - _this.coordinates[1] >= 0 ||
+                        bNode.coordinates[1] - _this.coordinates[1] >= 0)
+                        return aNode.coordinates[1] - bNode.coordinates[1];
+                    return bNode.coordinates[1] - aNode.coordinates[1];
+                }
+                var det = orientationIndex(_this.coordinates, aNode.coordinates, bNode.coordinates);
+                if (det < 0)
+                    return 1;
+                if (det > 0)
+                    return -1;
+                var d1 = Math.pow(aNode.coordinates[0] - _this.coordinates[0], 2) +
+                    Math.pow(aNode.coordinates[1] - _this.coordinates[1], 2), d2 = Math.pow(bNode.coordinates[0] - _this.coordinates[0], 2) +
+                    Math.pow(bNode.coordinates[1] - _this.coordinates[1], 2);
+                return d1 - d2;
+            });
+            this.outerEdgesSorted = true;
+        }
+    };
+    /**
+     * Retrieves outer edges.
+     *
+     * They are sorted if they aren't in the CCW order.
+     *
+     * @memberof Node
+     * @returns {Edge[]} - List of outer edges sorted in a CCW order.
+     */
+    Node.prototype.getOuterEdges = function () {
+        this.sortOuterEdges();
+        return this.outerEdges;
+    };
+    Node.prototype.getOuterEdge = function (i) {
+        this.sortOuterEdges();
+        return this.outerEdges[i];
+    };
+    Node.prototype.addInnerEdge = function (edge) {
+        this.innerEdges.push(edge);
+    };
+    return Node;
+}());
+export default Node;

frontend/node_modules/@turf/polygonize/dist/es/lib/util.js

@@ -0,0 +1,66 @@
+import booleanPointInPolygon from "@turf/boolean-point-in-polygon";
+import { point } from "@turf/helpers";
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign#Polyfill
+function mathSign(x) {
+    return ((x > 0) - (x < 0) || +x);
+}
+/**
+ * Returns the direction of the point q relative to the vector p1 -> p2.
+ *
+ * Implementation of geos::algorithm::CGAlgorithm::orientationIndex()
+ * (same as geos::algorithm::CGAlgorithm::computeOrientation())
+ *
+ * @param {number[]} p1 - the origin point of the vector
+ * @param {number[]} p2 - the final point of the vector
+ * @param {number[]} q - the point to compute the direction to
+ *
+ * @returns {number} - 1 if q is ccw (left) from p1->p2,
+ *    -1 if q is cw (right) from p1->p2,
+ *     0 if q is colinear with p1->p2
+ */
+export function orientationIndex(p1, p2, q) {
+    var dx1 = p2[0] - p1[0], dy1 = p2[1] - p1[1], dx2 = q[0] - p2[0], dy2 = q[1] - p2[1];
+    return mathSign(dx1 * dy2 - dx2 * dy1);
+}
+/**
+ * Checks if two envelopes are equal.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Rectangular polygon
+ *
+ * @param {Feature<Polygon>} env1 - Envelope
+ * @param {Feature<Polygon>} env2 - Envelope
+ * @returns {boolean} - True if the envelopes are equal
+ */
+export function envelopeIsEqual(env1, env2) {
+    var envX1 = env1.geometry.coordinates[0].map(function (c) { return c[0]; }), envY1 = env1.geometry.coordinates[0].map(function (c) { return c[1]; }), envX2 = env2.geometry.coordinates[0].map(function (c) { return c[0]; }), envY2 = env2.geometry.coordinates[0].map(function (c) { return c[1]; });
+    return (Math.max.apply(null, envX1) === Math.max.apply(null, envX2) &&
+        Math.max.apply(null, envY1) === Math.max.apply(null, envY2) &&
+        Math.min.apply(null, envX1) === Math.min.apply(null, envX2) &&
+        Math.min.apply(null, envY1) === Math.min.apply(null, envY2));
+}
+/**
+ * Check if a envelope is contained in other one.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Convex polygon
+ * XXX: Envelopes are rectangular, checking if a point is inside a rectangule is something easy,
+ * this could be further improved.
+ *
+ * @param {Feature<Polygon>} self - Envelope
+ * @param {Feature<Polygon>} env - Envelope
+ * @returns {boolean} - True if env is contained in self
+ */
+export function envelopeContains(self, env) {
+    return env.geometry.coordinates[0].every(function (c) {
+        return booleanPointInPolygon(point(c), self);
+    });
+}
+/**
+ * Checks if two coordinates are equal.
+ *
+ * @param {number[]} coord1 - First coordinate
+ * @param {number[]} coord2 - Second coordinate
+ * @returns {boolean} - True if coordinates are equal
+ */
+export function coordinatesEqual(coord1, coord2) {
+    return coord1[0] === coord2[0] && coord1[1] === coord2[1];
+}

frontend/node_modules/@turf/polygonize/dist/es/package.json

@@ -0,0 +1 @@
+{"type":"module"}

frontend/node_modules/@turf/polygonize/dist/js/index.d.ts

@@ -0,0 +1,20 @@
+import { Feature, FeatureCollection, LineString, MultiLineString, Polygon } from "@turf/helpers";
+/**
+ * Polygonizes {@link LineString|(Multi)LineString(s)} into {@link Polygons}.
+ *
+ * Implementation of GEOSPolygonize function (`geos::operation::polygonize::Polygonizer`).
+ *
+ * Polygonizes a set of lines that represents edges in a planar graph. Edges must be correctly
+ * noded, i.e., they must only meet at their endpoints.
+ *
+ * The implementation correctly handles:
+ *
+ * - Dangles: edges which have one or both ends which are not incident on another edge endpoint.
+ * - Cut Edges (bridges): edges that are connected at both ends but which do not form part of a polygon.
+ *
+ * @name polygonize
+ * @param {FeatureCollection|Geometry|Feature<LineString|MultiLineString>} geoJson Lines in order to polygonize
+ * @returns {FeatureCollection<Polygon>} Polygons created
+ * @throws {Error} if geoJson is invalid.
+ */
+export default function polygonize<T extends LineString | MultiLineString>(geoJson: Feature<T> | FeatureCollection<T> | T): FeatureCollection<Polygon>;

frontend/node_modules/@turf/polygonize/dist/js/index.js

@@ -0,0 +1,52 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var helpers_1 = require("@turf/helpers");
+var Graph_1 = __importDefault(require("./lib/Graph"));
+var EdgeRing_1 = __importDefault(require("./lib/EdgeRing"));
+/**
+ * Polygonizes {@link LineString|(Multi)LineString(s)} into {@link Polygons}.
+ *
+ * Implementation of GEOSPolygonize function (`geos::operation::polygonize::Polygonizer`).
+ *
+ * Polygonizes a set of lines that represents edges in a planar graph. Edges must be correctly
+ * noded, i.e., they must only meet at their endpoints.
+ *
+ * The implementation correctly handles:
+ *
+ * - Dangles: edges which have one or both ends which are not incident on another edge endpoint.
+ * - Cut Edges (bridges): edges that are connected at both ends but which do not form part of a polygon.
+ *
+ * @name polygonize
+ * @param {FeatureCollection|Geometry|Feature<LineString|MultiLineString>} geoJson Lines in order to polygonize
+ * @returns {FeatureCollection<Polygon>} Polygons created
+ * @throws {Error} if geoJson is invalid.
+ */
+function polygonize(geoJson) {
+    var graph = Graph_1.default.fromGeoJson(geoJson);
+    // 1. Remove dangle node
+    graph.deleteDangles();
+    // 2. Remove cut-edges (bridge edges)
+    graph.deleteCutEdges();
+    // 3. Get all holes and shells
+    var holes = [], shells = [];
+    graph
+        .getEdgeRings()
+        .filter(function (edgeRing) { return edgeRing.isValid(); })
+        .forEach(function (edgeRing) {
+        if (edgeRing.isHole())
+            holes.push(edgeRing);
+        else
+            shells.push(edgeRing);
+    });
+    // 4. Assign Holes to Shells
+    holes.forEach(function (hole) {
+        if (EdgeRing_1.default.findEdgeRingContaining(hole, shells))
+            shells.push(hole);
+    });
+    // 5. EdgeRings to Polygons
+    return helpers_1.featureCollection(shells.map(function (shell) { return shell.toPolygon(); }));
+}
+exports.default = polygonize;

frontend/node_modules/@turf/polygonize/dist/js/lib/Edge.d.ts

@@ -0,0 +1,55 @@
+import Node from "./Node";
+import EdgeRing from "./EdgeRing";
+/**
+ * This class is inspired by GEOS's geos::operation::polygonize::PolygonizeDirectedEdge
+ */
+export default class Edge {
+    label?: number;
+    symetric?: Edge;
+    from: Node;
+    to: Node;
+    next?: Edge;
+    ring?: EdgeRing;
+    /**
+     * Creates or get the symetric Edge.
+     *
+     * @returns {Edge} - Symetric Edge.
+     */
+    getSymetric(): Edge;
+    /**
+     * @param {Node} from - start node of the Edge
+     * @param {Node} to - end node of the edge
+     */
+    constructor(from: Node, to: Node);
+    /**
+     * Removes edge from from and to nodes.
+     */
+    deleteEdge(): void;
+    /**
+     * Compares Edge equallity.
+     *
+     * An edge is equal to another, if the from and to nodes are the same.
+     *
+     * @param {Edge} edge - Another Edge
+     * @returns {boolean} - True if Edges are equal, False otherwise
+     */
+    isEqual(edge: Edge): boolean;
+    toString(): string;
+    /**
+     * Returns a LineString representation of the Edge
+     *
+     * @returns {Feature<LineString>} - LineString representation of the Edge
+     */
+    toLineString(): import("@turf/helpers").Feature<import("@turf/helpers").LineString, import("@turf/helpers").Properties>;
+    /**
+     * Comparator of two edges.
+     *
+     * Implementation of geos::planargraph::DirectedEdge::compareTo.
+     *
+     * @param {Edge} edge - Another edge to compare with this one
+     * @returns {number} -1 if this Edge has a greater angle with the positive x-axis than b,
+     *          0 if the Edges are colinear,
+     *          1 otherwise
+     */
+    compareTo(edge: Edge): number;
+}

frontend/node_modules/@turf/polygonize/dist/js/lib/Edge.js

@@ -0,0 +1,79 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var helpers_1 = require("@turf/helpers");
+var util_1 = require("./util");
+/**
+ * This class is inspired by GEOS's geos::operation::polygonize::PolygonizeDirectedEdge
+ */
+var Edge = /** @class */ (function () {
+    /**
+     * @param {Node} from - start node of the Edge
+     * @param {Node} to - end node of the edge
+     */
+    function Edge(from, to) {
+        this.from = from; //< start
+        this.to = to; //< End
+        this.next = undefined; //< The edge to be computed after
+        this.label = undefined; //< Used in order to detect Cut Edges (Bridges)
+        this.symetric = undefined; //< The symetric edge of this
+        this.ring = undefined; //< EdgeRing in which the Edge is
+        this.from.addOuterEdge(this);
+        this.to.addInnerEdge(this);
+    }
+    /**
+     * Creates or get the symetric Edge.
+     *
+     * @returns {Edge} - Symetric Edge.
+     */
+    Edge.prototype.getSymetric = function () {
+        if (!this.symetric) {
+            this.symetric = new Edge(this.to, this.from);
+            this.symetric.symetric = this;
+        }
+        return this.symetric;
+    };
+    /**
+     * Removes edge from from and to nodes.
+     */
+    Edge.prototype.deleteEdge = function () {
+        this.from.removeOuterEdge(this);
+        this.to.removeInnerEdge(this);
+    };
+    /**
+     * Compares Edge equallity.
+     *
+     * An edge is equal to another, if the from and to nodes are the same.
+     *
+     * @param {Edge} edge - Another Edge
+     * @returns {boolean} - True if Edges are equal, False otherwise
+     */
+    Edge.prototype.isEqual = function (edge) {
+        return this.from.id === edge.from.id && this.to.id === edge.to.id;
+    };
+    Edge.prototype.toString = function () {
+        return "Edge { " + this.from.id + " -> " + this.to.id + " }";
+    };
+    /**
+     * Returns a LineString representation of the Edge
+     *
+     * @returns {Feature<LineString>} - LineString representation of the Edge
+     */
+    Edge.prototype.toLineString = function () {
+        return helpers_1.lineString([this.from.coordinates, this.to.coordinates]);
+    };
+    /**
+     * Comparator of two edges.
+     *
+     * Implementation of geos::planargraph::DirectedEdge::compareTo.
+     *
+     * @param {Edge} edge - Another edge to compare with this one
+     * @returns {number} -1 if this Edge has a greater angle with the positive x-axis than b,
+     *          0 if the Edges are colinear,
+     *          1 otherwise
+     */
+    Edge.prototype.compareTo = function (edge) {
+        return util_1.orientationIndex(edge.from.coordinates, edge.to.coordinates, this.to.coordinates);
+    };
+    return Edge;
+}());
+exports.default = Edge;

frontend/node_modules/@turf/polygonize/dist/js/lib/EdgeRing.d.ts

@@ -0,0 +1,122 @@
+import { Polygon, Feature, Point } from "@turf/helpers";
+import Edge from "./Edge";
+/**
+ * Ring of edges which form a polygon.
+ *
+ * The ring may be either an outer shell or a hole.
+ *
+ * This class is inspired in GEOS's geos::operation::polygonize::EdgeRing
+ */
+export default class EdgeRing {
+    private edges;
+    private polygon?;
+    private envelope?;
+    constructor();
+    /**
+     * Add an edge to the ring, inserting it in the last position.
+     *
+     * @memberof EdgeRing
+     * @param {Edge} edge - Edge to be inserted
+     */
+    push(edge: Edge): void;
+    /**
+     * Get Edge.
+     *
+     * @memberof EdgeRing
+     * @param {number} i - Index
+     * @returns {Edge} - Edge in the i position
+     */
+    get(i: number): Edge;
+    /**
+     * Getter of length property.
+     *
+     * @memberof EdgeRing
+     * @returns {number} - Length of the edge ring.
+     */
+    get length(): number;
+    /**
+     * Similar to Array.prototype.forEach for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.forEach
+     */
+    forEach(f: (edge: Edge, index: number, array: Edge[]) => void): void;
+    /**
+     * Similar to Array.prototype.map for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.map
+     * @returns {Array} - The mapped values in the function
+     */
+    map<T>(f: (edge: Edge, index: number, array: Edge[]) => T): T[];
+    /**
+     * Similar to Array.prototype.some for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.some
+     * @returns {boolean} - True if an Edge check the condition
+     */
+    some(f: (edge: Edge, index: number, array: Edge[]) => boolean): boolean;
+    /**
+     * Check if the ring is valid in geomtry terms.
+     *
+     * A ring must have either 0 or 4 or more points. The first and the last must be
+     * equal (in 2D)
+     * geos::geom::LinearRing::validateConstruction
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - Validity of the EdgeRing
+     */
+    isValid(): boolean;
+    /**
+     * Tests whether this ring is a hole.
+     *
+     * A ring is a hole if it is oriented counter-clockwise.
+     * Similar implementation of geos::algorithm::CGAlgorithms::isCCW
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - true: if it is a hole
+     */
+    isHole(): boolean;
+    /**
+     * Creates a MultiPoint representing the EdgeRing (discarts edges directions).
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<MultiPoint>} - Multipoint representation of the EdgeRing
+     */
+    toMultiPoint(): Feature<import("@turf/helpers").MultiPoint, import("@turf/helpers").Properties>;
+    /**
+     * Creates a Polygon representing the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - Polygon representation of the Edge Ring
+     */
+    toPolygon(): Feature<Polygon, {
+        [name: string]: any;
+    }>;
+    /**
+     * Calculates the envelope of the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - envelope
+     */
+    getEnvelope(): Feature<Polygon, {
+        [name: string]: any;
+    }>;
+    /**
+     * `geos::operation::polygonize::EdgeRing::findEdgeRingContaining`
+     *
+     * @param {EdgeRing} testEdgeRing - EdgeRing to look in the list
+     * @param {EdgeRing[]} shellList - List of EdgeRing in which to search
+     *
+     * @returns {EdgeRing} - EdgeRing which contains the testEdgeRing
+     */
+    static findEdgeRingContaining(testEdgeRing: EdgeRing, shellList: EdgeRing[]): EdgeRing | undefined;
+    /**
+     * Checks if the point is inside the edgeRing
+     *
+     * @param {Feature<Point>} pt - Point to check if it is inside the edgeRing
+     * @returns {boolean} - True if it is inside, False otherwise
+     */
+    inside(pt: Feature<Point>): boolean;
+}

frontend/node_modules/@turf/polygonize/dist/js/lib/EdgeRing.js

@@ -0,0 +1,204 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var util_1 = require("./util");
+var helpers_1 = require("@turf/helpers");
+var envelope_1 = __importDefault(require("@turf/envelope"));
+var boolean_point_in_polygon_1 = __importDefault(require("@turf/boolean-point-in-polygon"));
+/**
+ * Ring of edges which form a polygon.
+ *
+ * The ring may be either an outer shell or a hole.
+ *
+ * This class is inspired in GEOS's geos::operation::polygonize::EdgeRing
+ */
+var EdgeRing = /** @class */ (function () {
+    function EdgeRing() {
+        this.edges = [];
+        this.polygon = undefined; //< Caches Polygon representation
+        this.envelope = undefined; //< Caches Envelope representation
+    }
+    /**
+     * Add an edge to the ring, inserting it in the last position.
+     *
+     * @memberof EdgeRing
+     * @param {Edge} edge - Edge to be inserted
+     */
+    EdgeRing.prototype.push = function (edge) {
+        this.edges.push(edge);
+        this.polygon = this.envelope = undefined;
+    };
+    /**
+     * Get Edge.
+     *
+     * @memberof EdgeRing
+     * @param {number} i - Index
+     * @returns {Edge} - Edge in the i position
+     */
+    EdgeRing.prototype.get = function (i) {
+        return this.edges[i];
+    };
+    Object.defineProperty(EdgeRing.prototype, "length", {
+        /**
+         * Getter of length property.
+         *
+         * @memberof EdgeRing
+         * @returns {number} - Length of the edge ring.
+         */
+        get: function () {
+            return this.edges.length;
+        },
+        enumerable: true,
+        configurable: true
+    });
+    /**
+     * Similar to Array.prototype.forEach for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.forEach
+     */
+    EdgeRing.prototype.forEach = function (f) {
+        this.edges.forEach(f);
+    };
+    /**
+     * Similar to Array.prototype.map for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.map
+     * @returns {Array} - The mapped values in the function
+     */
+    EdgeRing.prototype.map = function (f) {
+        return this.edges.map(f);
+    };
+    /**
+     * Similar to Array.prototype.some for the list of Edges in the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @param {Function} f - The same function to be passed to Array.prototype.some
+     * @returns {boolean} - True if an Edge check the condition
+     */
+    EdgeRing.prototype.some = function (f) {
+        return this.edges.some(f);
+    };
+    /**
+     * Check if the ring is valid in geomtry terms.
+     *
+     * A ring must have either 0 or 4 or more points. The first and the last must be
+     * equal (in 2D)
+     * geos::geom::LinearRing::validateConstruction
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - Validity of the EdgeRing
+     */
+    EdgeRing.prototype.isValid = function () {
+        // TODO: stub
+        return true;
+    };
+    /**
+     * Tests whether this ring is a hole.
+     *
+     * A ring is a hole if it is oriented counter-clockwise.
+     * Similar implementation of geos::algorithm::CGAlgorithms::isCCW
+     *
+     * @memberof EdgeRing
+     * @returns {boolean} - true: if it is a hole
+     */
+    EdgeRing.prototype.isHole = function () {
+        var _this = this;
+        // XXX: Assuming Ring is valid
+        // Find highest point
+        var hiIndex = this.edges.reduce(function (high, edge, i) {
+            if (edge.from.coordinates[1] > _this.edges[high].from.coordinates[1])
+                high = i;
+            return high;
+        }, 0), iPrev = (hiIndex === 0 ? this.length : hiIndex) - 1, iNext = (hiIndex + 1) % this.length, disc = util_1.orientationIndex(this.edges[iPrev].from.coordinates, this.edges[hiIndex].from.coordinates, this.edges[iNext].from.coordinates);
+        if (disc === 0)
+            return (this.edges[iPrev].from.coordinates[0] >
+                this.edges[iNext].from.coordinates[0]);
+        return disc > 0;
+    };
+    /**
+     * Creates a MultiPoint representing the EdgeRing (discarts edges directions).
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<MultiPoint>} - Multipoint representation of the EdgeRing
+     */
+    EdgeRing.prototype.toMultiPoint = function () {
+        return helpers_1.multiPoint(this.edges.map(function (edge) { return edge.from.coordinates; }));
+    };
+    /**
+     * Creates a Polygon representing the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - Polygon representation of the Edge Ring
+     */
+    EdgeRing.prototype.toPolygon = function () {
+        if (this.polygon)
+            return this.polygon;
+        var coordinates = this.edges.map(function (edge) { return edge.from.coordinates; });
+        coordinates.push(this.edges[0].from.coordinates);
+        return (this.polygon = helpers_1.polygon([coordinates]));
+    };
+    /**
+     * Calculates the envelope of the EdgeRing.
+     *
+     * @memberof EdgeRing
+     * @returns {Feature<Polygon>} - envelope
+     */
+    EdgeRing.prototype.getEnvelope = function () {
+        if (this.envelope)
+            return this.envelope;
+        return (this.envelope = envelope_1.default(this.toPolygon()));
+    };
+    /**
+     * `geos::operation::polygonize::EdgeRing::findEdgeRingContaining`
+     *
+     * @param {EdgeRing} testEdgeRing - EdgeRing to look in the list
+     * @param {EdgeRing[]} shellList - List of EdgeRing in which to search
+     *
+     * @returns {EdgeRing} - EdgeRing which contains the testEdgeRing
+     */
+    EdgeRing.findEdgeRingContaining = function (testEdgeRing, shellList) {
+        var testEnvelope = testEdgeRing.getEnvelope();
+        var minEnvelope, minShell;
+        shellList.forEach(function (shell) {
+            var tryEnvelope = shell.getEnvelope();
+            if (minShell)
+                minEnvelope = minShell.getEnvelope();
+            // the hole envelope cannot equal the shell envelope
+            if (util_1.envelopeIsEqual(tryEnvelope, testEnvelope))
+                return;
+            if (util_1.envelopeContains(tryEnvelope, testEnvelope)) {
+                var testEdgeRingCoordinates = testEdgeRing.map(function (edge) { return edge.from.coordinates; });
+                var testPoint = void 0;
+                var _loop_1 = function (pt) {
+                    if (!shell.some(function (edge) { return util_1.coordinatesEqual(pt, edge.from.coordinates); })) {
+                        testPoint = pt;
+                    }
+                };
+                for (var _i = 0, testEdgeRingCoordinates_1 = testEdgeRingCoordinates; _i < testEdgeRingCoordinates_1.length; _i++) {
+                    var pt = testEdgeRingCoordinates_1[_i];
+                    _loop_1(pt);
+                }
+                if (testPoint && shell.inside(helpers_1.point(testPoint))) {
+                    if (!minShell || util_1.envelopeContains(minEnvelope, tryEnvelope))
+                        minShell = shell;
+                }
+            }
+        });
+        return minShell;
+    };
+    /**
+     * Checks if the point is inside the edgeRing
+     *
+     * @param {Feature<Point>} pt - Point to check if it is inside the edgeRing
+     * @returns {boolean} - True if it is inside, False otherwise
+     */
+    EdgeRing.prototype.inside = function (pt) {
+        return boolean_point_in_polygon_1.default(pt, this.toPolygon());
+    };
+    return EdgeRing;
+}());
+exports.default = EdgeRing;

frontend/node_modules/@turf/polygonize/dist/js/lib/Graph.d.ts

@@ -0,0 +1,124 @@
+import Node from "./Node";
+import Edge from "./Edge";
+import EdgeRing from "./EdgeRing";
+import { FeatureCollection, LineString, MultiLineString, Feature } from "@turf/helpers";
+/**
+ * Represents a planar graph of edges and nodes that can be used to compute a polygonization.
+ *
+ * Although, this class is inspired by GEOS's `geos::operation::polygonize::PolygonizeGraph`,
+ * it isn't a rewrite. As regards algorithm, this class implements the same logic, but it
+ * isn't a javascript transcription of the C++ source.
+ *
+ * This graph is directed (both directions are created)
+ */
+export default class Graph {
+    private nodes;
+    private edges;
+    /**
+     * Creates a graph from a GeoJSON.
+     *
+     * @param {FeatureCollection<LineString>} geoJson - it must comply with the restrictions detailed in the index
+     * @returns {Graph} - The newly created graph
+     * @throws {Error} if geoJson is invalid.
+     */
+    static fromGeoJson(geoJson: FeatureCollection<LineString | MultiLineString> | LineString | MultiLineString | Feature<LineString | MultiLineString>): Graph;
+    /**
+     * Creates or get a Node.
+     *
+     * @param {number[]} coordinates - Coordinates of the node
+     * @returns {Node} - The created or stored node
+     */
+    getNode(coordinates: number[]): Node;
+    /**
+     * Adds an Edge and its symetricall.
+     *
+     * Edges are added symetrically, i.e.: we also add its symetric
+     *
+     * @param {Node} from - Node which starts the Edge
+     * @param {Node} to - Node which ends the Edge
+     */
+    addEdge(from: Node, to: Node): void;
+    constructor();
+    /**
+     * Removes Dangle Nodes (nodes with grade 1).
+     */
+    deleteDangles(): void;
+    /**
+     * Check if node is dangle, if so, remove it.
+     *
+     * It calls itself recursively, removing a dangling node might cause another dangling node
+     *
+     * @param {Node} node - Node to check if it's a dangle
+     */
+    _removeIfDangle(node: Node): void;
+    /**
+     * Delete cut-edges (bridge edges).
+     *
+     * The graph will be traversed, all the edges will be labeled according the ring
+     * in which they are. (The label is a number incremented by 1). Edges with the same
+     * label are cut-edges.
+     */
+    deleteCutEdges(): void;
+    /**
+     * Set the `next` property of each Edge.
+     *
+     * The graph will be transversed in a CW form, so, we set the next of the symetrical edge as the previous one.
+     * OuterEdges are sorted CCW.
+     *
+     * @param {Node} [node] - If no node is passed, the function calls itself for every node in the Graph
+     */
+    _computeNextCWEdges(node?: Node): void;
+    /**
+     * Computes the next edge pointers going CCW around the given node, for the given edgering label.
+     *
+     * This algorithm has the effect of converting maximal edgerings into minimal edgerings
+     *
+     * XXX: method literally transcribed from `geos::operation::polygonize::PolygonizeGraph::computeNextCCWEdges`,
+     * could be written in a more javascript way.
+     *
+     * @param {Node} node - Node
+     * @param {number} label - Ring's label
+     */
+    _computeNextCCWEdges(node: Node, label: number): void;
+    /**
+     * Finds rings and labels edges according to which rings are.
+     *
+     * The label is a number which is increased for each ring.
+     *
+     * @returns {Edge[]} edges that start rings
+     */
+    _findLabeledEdgeRings(): Edge[];
+    /**
+     * Computes the EdgeRings formed by the edges in this graph.
+     *
+     * @returns {EdgeRing[]} - A list of all the EdgeRings in the graph.
+     */
+    getEdgeRings(): EdgeRing[];
+    /**
+     * Find all nodes in a Maxima EdgeRing which are self-intersection nodes.
+     *
+     * @param {Node} startEdge - Start Edge of the Ring
+     * @returns {Node[]} - intersection nodes
+     */
+    _findIntersectionNodes(startEdge: Edge): Node[];
+    /**
+     * Get the edge-ring which starts from the provided Edge.
+     *
+     * @param {Edge} startEdge - starting edge of the edge ring
+     * @returns {EdgeRing} - EdgeRing which start Edge is the provided one.
+     */
+    _findEdgeRing(startEdge: Edge): EdgeRing;
+    /**
+     * Removes a node from the Graph.
+     *
+     * It also removes edges asociated to that node
+     * @param {Node} node - Node to be removed
+     */
+    removeNode(node: Node): void;
+    /**
+     * Remove edge from the graph and deletes the edge.
+     *
+     * @param {Edge} edge - Edge to be removed
+     */
+    removeEdge(edge: Edge): void;
+}

frontend/node_modules/@turf/polygonize/dist/js/lib/Graph.js

@@ -0,0 +1,307 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var Node_1 = __importDefault(require("./Node"));
+var Edge_1 = __importDefault(require("./Edge"));
+var EdgeRing_1 = __importDefault(require("./EdgeRing"));
+var meta_1 = require("@turf/meta");
+var invariant_1 = require("@turf/invariant");
+/**
+ * Validates the geoJson.
+ *
+ * @param {GeoJSON} geoJson - input geoJson.
+ * @throws {Error} if geoJson is invalid.
+ */
+function validateGeoJson(geoJson) {
+    if (!geoJson)
+        throw new Error("No geojson passed");
+    if (geoJson.type !== "FeatureCollection" &&
+        geoJson.type !== "GeometryCollection" &&
+        geoJson.type !== "MultiLineString" &&
+        geoJson.type !== "LineString" &&
+        geoJson.type !== "Feature")
+        throw new Error("Invalid input type '" + geoJson.type + "'. Geojson must be FeatureCollection, GeometryCollection, LineString, MultiLineString or Feature");
+}
+/**
+ * Represents a planar graph of edges and nodes that can be used to compute a polygonization.
+ *
+ * Although, this class is inspired by GEOS's `geos::operation::polygonize::PolygonizeGraph`,
+ * it isn't a rewrite. As regards algorithm, this class implements the same logic, but it
+ * isn't a javascript transcription of the C++ source.
+ *
+ * This graph is directed (both directions are created)
+ */
+var Graph = /** @class */ (function () {
+    function Graph() {
+        this.edges = []; //< {Edge[]} dirEdges
+        // The key is the `id` of the Node (ie: coordinates.join(','))
+        this.nodes = {};
+    }
+    /**
+     * Creates a graph from a GeoJSON.
+     *
+     * @param {FeatureCollection<LineString>} geoJson - it must comply with the restrictions detailed in the index
+     * @returns {Graph} - The newly created graph
+     * @throws {Error} if geoJson is invalid.
+     */
+    Graph.fromGeoJson = function (geoJson) {
+        validateGeoJson(geoJson);
+        var graph = new Graph();
+        meta_1.flattenEach(geoJson, function (feature) {
+            invariant_1.featureOf(feature, "LineString", "Graph::fromGeoJson");
+            // When a LineString if formed by many segments, split them
+            meta_1.coordReduce(feature, function (prev, cur) {
+                if (prev) {
+                    var start = graph.getNode(prev), end = graph.getNode(cur);
+                    graph.addEdge(start, end);
+                }
+                return cur;
+            });
+        });
+        return graph;
+    };
+    /**
+     * Creates or get a Node.
+     *
+     * @param {number[]} coordinates - Coordinates of the node
+     * @returns {Node} - The created or stored node
+     */
+    Graph.prototype.getNode = function (coordinates) {
+        var id = Node_1.default.buildId(coordinates);
+        var node = this.nodes[id];
+        if (!node)
+            node = this.nodes[id] = new Node_1.default(coordinates);
+        return node;
+    };
+    /**
+     * Adds an Edge and its symetricall.
+     *
+     * Edges are added symetrically, i.e.: we also add its symetric
+     *
+     * @param {Node} from - Node which starts the Edge
+     * @param {Node} to - Node which ends the Edge
+     */
+    Graph.prototype.addEdge = function (from, to) {
+        var edge = new Edge_1.default(from, to), symetricEdge = edge.getSymetric();
+        this.edges.push(edge);
+        this.edges.push(symetricEdge);
+    };
+    /**
+     * Removes Dangle Nodes (nodes with grade 1).
+     */
+    Graph.prototype.deleteDangles = function () {
+        var _this = this;
+        Object.keys(this.nodes)
+            .map(function (id) { return _this.nodes[id]; })
+            .forEach(function (node) { return _this._removeIfDangle(node); });
+    };
+    /**
+     * Check if node is dangle, if so, remove it.
+     *
+     * It calls itself recursively, removing a dangling node might cause another dangling node
+     *
+     * @param {Node} node - Node to check if it's a dangle
+     */
+    Graph.prototype._removeIfDangle = function (node) {
+        var _this = this;
+        // As edges are directed and symetrical, we count only innerEdges
+        if (node.innerEdges.length <= 1) {
+            var outerNodes = node.getOuterEdges().map(function (e) { return e.to; });
+            this.removeNode(node);
+            outerNodes.forEach(function (n) { return _this._removeIfDangle(n); });
+        }
+    };
+    /**
+     * Delete cut-edges (bridge edges).
+     *
+     * The graph will be traversed, all the edges will be labeled according the ring
+     * in which they are. (The label is a number incremented by 1). Edges with the same
+     * label are cut-edges.
+     */
+    Graph.prototype.deleteCutEdges = function () {
+        var _this = this;
+        this._computeNextCWEdges();
+        this._findLabeledEdgeRings();
+        // Cut-edges (bridges) are edges where both edges have the same label
+        this.edges.forEach(function (edge) {
+            if (edge.label === edge.symetric.label) {
+                _this.removeEdge(edge.symetric);
+                _this.removeEdge(edge);
+            }
+        });
+    };
+    /**
+     * Set the `next` property of each Edge.
+     *
+     * The graph will be transversed in a CW form, so, we set the next of the symetrical edge as the previous one.
+     * OuterEdges are sorted CCW.
+     *
+     * @param {Node} [node] - If no node is passed, the function calls itself for every node in the Graph
+     */
+    Graph.prototype._computeNextCWEdges = function (node) {
+        var _this = this;
+        if (typeof node === "undefined") {
+            Object.keys(this.nodes).forEach(function (id) {
+                return _this._computeNextCWEdges(_this.nodes[id]);
+            });
+        }
+        else {
+            node.getOuterEdges().forEach(function (edge, i) {
+                node.getOuterEdge((i === 0 ? node.getOuterEdges().length : i) - 1).symetric.next = edge;
+            });
+        }
+    };
+    /**
+     * Computes the next edge pointers going CCW around the given node, for the given edgering label.
+     *
+     * This algorithm has the effect of converting maximal edgerings into minimal edgerings
+     *
+     * XXX: method literally transcribed from `geos::operation::polygonize::PolygonizeGraph::computeNextCCWEdges`,
+     * could be written in a more javascript way.
+     *
+     * @param {Node} node - Node
+     * @param {number} label - Ring's label
+     */
+    Graph.prototype._computeNextCCWEdges = function (node, label) {
+        var edges = node.getOuterEdges();
+        var firstOutDE, prevInDE;
+        for (var i = edges.length - 1; i >= 0; --i) {
+            var de = edges[i], sym = de.symetric, outDE = void 0, inDE = void 0;
+            if (de.label === label)
+                outDE = de;
+            if (sym.label === label)
+                inDE = sym;
+            if (!outDE || !inDE)
+                // This edge is not in edgering
+                continue;
+            if (inDE)
+                prevInDE = inDE;
+            if (outDE) {
+                if (prevInDE) {
+                    prevInDE.next = outDE;
+                    prevInDE = undefined;
+                }
+                if (!firstOutDE)
+                    firstOutDE = outDE;
+            }
+        }
+        if (prevInDE)
+            prevInDE.next = firstOutDE;
+    };
+    /**
+     * Finds rings and labels edges according to which rings are.
+     *
+     * The label is a number which is increased for each ring.
+     *
+     * @returns {Edge[]} edges that start rings
+     */
+    Graph.prototype._findLabeledEdgeRings = function () {
+        var edgeRingStarts = [];
+        var label = 0;
+        this.edges.forEach(function (edge) {
+            if (edge.label >= 0)
+                return;
+            edgeRingStarts.push(edge);
+            var e = edge;
+            do {
+                e.label = label;
+                e = e.next;
+            } while (!edge.isEqual(e));
+            label++;
+        });
+        return edgeRingStarts;
+    };
+    /**
+     * Computes the EdgeRings formed by the edges in this graph.
+     *
+     * @returns {EdgeRing[]} - A list of all the EdgeRings in the graph.
+     */
+    Graph.prototype.getEdgeRings = function () {
+        var _this = this;
+        this._computeNextCWEdges();
+        // Clear labels
+        this.edges.forEach(function (edge) {
+            edge.label = undefined;
+        });
+        this._findLabeledEdgeRings().forEach(function (edge) {
+            // convertMaximalToMinimalEdgeRings
+            _this._findIntersectionNodes(edge).forEach(function (node) {
+                _this._computeNextCCWEdges(node, edge.label);
+            });
+        });
+        var edgeRingList = [];
+        // find all edgerings
+        this.edges.forEach(function (edge) {
+            if (edge.ring)
+                return;
+            edgeRingList.push(_this._findEdgeRing(edge));
+        });
+        return edgeRingList;
+    };
+    /**
+     * Find all nodes in a Maxima EdgeRing which are self-intersection nodes.
+     *
+     * @param {Node} startEdge - Start Edge of the Ring
+     * @returns {Node[]} - intersection nodes
+     */
+    Graph.prototype._findIntersectionNodes = function (startEdge) {
+        var intersectionNodes = [];
+        var edge = startEdge;
+        var _loop_1 = function () {
+            // getDegree
+            var degree = 0;
+            edge.from.getOuterEdges().forEach(function (e) {
+                if (e.label === startEdge.label)
+                    ++degree;
+            });
+            if (degree > 1)
+                intersectionNodes.push(edge.from);
+            edge = edge.next;
+        };
+        do {
+            _loop_1();
+        } while (!startEdge.isEqual(edge));
+        return intersectionNodes;
+    };
+    /**
+     * Get the edge-ring which starts from the provided Edge.
+     *
+     * @param {Edge} startEdge - starting edge of the edge ring
+     * @returns {EdgeRing} - EdgeRing which start Edge is the provided one.
+     */
+    Graph.prototype._findEdgeRing = function (startEdge) {
+        var edge = startEdge;
+        var edgeRing = new EdgeRing_1.default();
+        do {
+            edgeRing.push(edge);
+            edge.ring = edgeRing;
+            edge = edge.next;
+        } while (!startEdge.isEqual(edge));
+        return edgeRing;
+    };
+    /**
+     * Removes a node from the Graph.
+     *
+     * It also removes edges asociated to that node
+     * @param {Node} node - Node to be removed
+     */
+    Graph.prototype.removeNode = function (node) {
+        var _this = this;
+        node.getOuterEdges().forEach(function (edge) { return _this.removeEdge(edge); });
+        node.innerEdges.forEach(function (edge) { return _this.removeEdge(edge); });
+        delete this.nodes[node.id];
+    };
+    /**
+     * Remove edge from the graph and deletes the edge.
+     *
+     * @param {Edge} edge - Edge to be removed
+     */
+    Graph.prototype.removeEdge = function (edge) {
+        this.edges = this.edges.filter(function (e) { return !e.isEqual(edge); });
+        edge.deleteEdge();
+    };
+    return Graph;
+}());
+exports.default = Graph;

frontend/node_modules/@turf/polygonize/dist/js/lib/Node.d.ts

@@ -0,0 +1,40 @@
+import Edge from "./Edge";
+/**
+ * Node
+ */
+export default class Node {
+    static buildId(coordinates: number[]): string;
+    id: string;
+    coordinates: number[];
+    innerEdges: Edge[];
+    private outerEdges;
+    private outerEdgesSorted;
+    constructor(coordinates: number[]);
+    removeInnerEdge(edge: Edge): void;
+    removeOuterEdge(edge: Edge): void;
+    /**
+     * Outer edges are stored CCW order.
+     *
+     * @memberof Node
+     * @param {Edge} edge - Edge to add as an outerEdge.
+     */
+    addOuterEdge(edge: Edge): void;
+    /**
+     * Sorts outer edges in CCW way.
+     *
+     * @memberof Node
+     * @private
+     */
+    sortOuterEdges(): void;
+    /**
+     * Retrieves outer edges.
+     *
+     * They are sorted if they aren't in the CCW order.
+     *
+     * @memberof Node
+     * @returns {Edge[]} - List of outer edges sorted in a CCW order.
+     */
+    getOuterEdges(): Edge[];
+    getOuterEdge(i: number): Edge;
+    addInnerEdge(edge: Edge): void;
+}

frontend/node_modules/@turf/polygonize/dist/js/lib/Node.js

@@ -0,0 +1,95 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+var util_1 = require("./util");
+/**
+ * Node
+ */
+var Node = /** @class */ (function () {
+    function Node(coordinates) {
+        this.id = Node.buildId(coordinates);
+        this.coordinates = coordinates; //< {Number[]}
+        this.innerEdges = []; //< {Edge[]}
+        // We wil store to (out) edges in an CCW order as geos::planargraph::DirectedEdgeStar does
+        this.outerEdges = []; //< {Edge[]}
+        this.outerEdgesSorted = false; //< {Boolean} flag that stores if the outer Edges had been sorted
+    }
+    Node.buildId = function (coordinates) {
+        return coordinates.join(",");
+    };
+    Node.prototype.removeInnerEdge = function (edge) {
+        this.innerEdges = this.innerEdges.filter(function (e) { return e.from.id !== edge.from.id; });
+    };
+    Node.prototype.removeOuterEdge = function (edge) {
+        this.outerEdges = this.outerEdges.filter(function (e) { return e.to.id !== edge.to.id; });
+    };
+    /**
+     * Outer edges are stored CCW order.
+     *
+     * @memberof Node
+     * @param {Edge} edge - Edge to add as an outerEdge.
+     */
+    Node.prototype.addOuterEdge = function (edge) {
+        this.outerEdges.push(edge);
+        this.outerEdgesSorted = false;
+    };
+    /**
+     * Sorts outer edges in CCW way.
+     *
+     * @memberof Node
+     * @private
+     */
+    Node.prototype.sortOuterEdges = function () {
+        var _this = this;
+        if (!this.outerEdgesSorted) {
+            //this.outerEdges.sort((a, b) => a.compareTo(b));
+            // Using this comparator in order to be deterministic
+            this.outerEdges.sort(function (a, b) {
+                var aNode = a.to, bNode = b.to;
+                if (aNode.coordinates[0] - _this.coordinates[0] >= 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] < 0)
+                    return 1;
+                if (aNode.coordinates[0] - _this.coordinates[0] < 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] >= 0)
+                    return -1;
+                if (aNode.coordinates[0] - _this.coordinates[0] === 0 &&
+                    bNode.coordinates[0] - _this.coordinates[0] === 0) {
+                    if (aNode.coordinates[1] - _this.coordinates[1] >= 0 ||
+                        bNode.coordinates[1] - _this.coordinates[1] >= 0)
+                        return aNode.coordinates[1] - bNode.coordinates[1];
+                    return bNode.coordinates[1] - aNode.coordinates[1];
+                }
+                var det = util_1.orientationIndex(_this.coordinates, aNode.coordinates, bNode.coordinates);
+                if (det < 0)
+                    return 1;
+                if (det > 0)
+                    return -1;
+                var d1 = Math.pow(aNode.coordinates[0] - _this.coordinates[0], 2) +
+                    Math.pow(aNode.coordinates[1] - _this.coordinates[1], 2), d2 = Math.pow(bNode.coordinates[0] - _this.coordinates[0], 2) +
+                    Math.pow(bNode.coordinates[1] - _this.coordinates[1], 2);
+                return d1 - d2;
+            });
+            this.outerEdgesSorted = true;
+        }
+    };
+    /**
+     * Retrieves outer edges.
+     *
+     * They are sorted if they aren't in the CCW order.
+     *
+     * @memberof Node
+     * @returns {Edge[]} - List of outer edges sorted in a CCW order.
+     */
+    Node.prototype.getOuterEdges = function () {
+        this.sortOuterEdges();
+        return this.outerEdges;
+    };
+    Node.prototype.getOuterEdge = function (i) {
+        this.sortOuterEdges();
+        return this.outerEdges[i];
+    };
+    Node.prototype.addInnerEdge = function (edge) {
+        this.innerEdges.push(edge);
+    };
+    return Node;
+}());
+exports.default = Node;

frontend/node_modules/@turf/polygonize/dist/js/lib/util.d.ts

@@ -0,0 +1,46 @@
+import { Feature, Polygon } from "@turf/helpers";
+/**
+ * Returns the direction of the point q relative to the vector p1 -> p2.
+ *
+ * Implementation of geos::algorithm::CGAlgorithm::orientationIndex()
+ * (same as geos::algorithm::CGAlgorithm::computeOrientation())
+ *
+ * @param {number[]} p1 - the origin point of the vector
+ * @param {number[]} p2 - the final point of the vector
+ * @param {number[]} q - the point to compute the direction to
+ *
+ * @returns {number} - 1 if q is ccw (left) from p1->p2,
+ *    -1 if q is cw (right) from p1->p2,
+ *     0 if q is colinear with p1->p2
+ */
+export declare function orientationIndex(p1: number[], p2: number[], q: number[]): number;
+/**
+ * Checks if two envelopes are equal.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Rectangular polygon
+ *
+ * @param {Feature<Polygon>} env1 - Envelope
+ * @param {Feature<Polygon>} env2 - Envelope
+ * @returns {boolean} - True if the envelopes are equal
+ */
+export declare function envelopeIsEqual(env1: Feature<Polygon>, env2: Feature<Polygon>): boolean;
+/**
+ * Check if a envelope is contained in other one.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Convex polygon
+ * XXX: Envelopes are rectangular, checking if a point is inside a rectangule is something easy,
+ * this could be further improved.
+ *
+ * @param {Feature<Polygon>} self - Envelope
+ * @param {Feature<Polygon>} env - Envelope
+ * @returns {boolean} - True if env is contained in self
+ */
+export declare function envelopeContains(self: Feature<Polygon>, env: Feature<Polygon>): boolean;
+/**
+ * Checks if two coordinates are equal.
+ *
+ * @param {number[]} coord1 - First coordinate
+ * @param {number[]} coord2 - Second coordinate
+ * @returns {boolean} - True if coordinates are equal
+ */
+export declare function coordinatesEqual(coord1: number[], coord2: number[]): boolean;

frontend/node_modules/@turf/polygonize/dist/js/lib/util.js

@@ -0,0 +1,75 @@
+"use strict";
+var __importDefault = (this && this.__importDefault) || function (mod) {
+    return (mod && mod.__esModule) ? mod : { "default": mod };
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+var boolean_point_in_polygon_1 = __importDefault(require("@turf/boolean-point-in-polygon"));
+var helpers_1 = require("@turf/helpers");
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign#Polyfill
+function mathSign(x) {
+    return ((x > 0) - (x < 0) || +x);
+}
+/**
+ * Returns the direction of the point q relative to the vector p1 -> p2.
+ *
+ * Implementation of geos::algorithm::CGAlgorithm::orientationIndex()
+ * (same as geos::algorithm::CGAlgorithm::computeOrientation())
+ *
+ * @param {number[]} p1 - the origin point of the vector
+ * @param {number[]} p2 - the final point of the vector
+ * @param {number[]} q - the point to compute the direction to
+ *
+ * @returns {number} - 1 if q is ccw (left) from p1->p2,
+ *    -1 if q is cw (right) from p1->p2,
+ *     0 if q is colinear with p1->p2
+ */
+function orientationIndex(p1, p2, q) {
+    var dx1 = p2[0] - p1[0], dy1 = p2[1] - p1[1], dx2 = q[0] - p2[0], dy2 = q[1] - p2[1];
+    return mathSign(dx1 * dy2 - dx2 * dy1);
+}
+exports.orientationIndex = orientationIndex;
+/**
+ * Checks if two envelopes are equal.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Rectangular polygon
+ *
+ * @param {Feature<Polygon>} env1 - Envelope
+ * @param {Feature<Polygon>} env2 - Envelope
+ * @returns {boolean} - True if the envelopes are equal
+ */
+function envelopeIsEqual(env1, env2) {
+    var envX1 = env1.geometry.coordinates[0].map(function (c) { return c[0]; }), envY1 = env1.geometry.coordinates[0].map(function (c) { return c[1]; }), envX2 = env2.geometry.coordinates[0].map(function (c) { return c[0]; }), envY2 = env2.geometry.coordinates[0].map(function (c) { return c[1]; });
+    return (Math.max.apply(null, envX1) === Math.max.apply(null, envX2) &&
+        Math.max.apply(null, envY1) === Math.max.apply(null, envY2) &&
+        Math.min.apply(null, envX1) === Math.min.apply(null, envX2) &&
+        Math.min.apply(null, envY1) === Math.min.apply(null, envY2));
+}
+exports.envelopeIsEqual = envelopeIsEqual;
+/**
+ * Check if a envelope is contained in other one.
+ *
+ * The function assumes that the arguments are envelopes, i.e.: Convex polygon
+ * XXX: Envelopes are rectangular, checking if a point is inside a rectangule is something easy,
+ * this could be further improved.
+ *
+ * @param {Feature<Polygon>} self - Envelope
+ * @param {Feature<Polygon>} env - Envelope
+ * @returns {boolean} - True if env is contained in self
+ */
+function envelopeContains(self, env) {
+    return env.geometry.coordinates[0].every(function (c) {
+        return boolean_point_in_polygon_1.default(helpers_1.point(c), self);
+    });
+}
+exports.envelopeContains = envelopeContains;
+/**
+ * Checks if two coordinates are equal.
+ *
+ * @param {number[]} coord1 - First coordinate
+ * @param {number[]} coord2 - Second coordinate
+ * @returns {boolean} - True if coordinates are equal
+ */
+function coordinatesEqual(coord1, coord2) {
+    return coord1[0] === coord2[0] && coord1[1] === coord2[1];
+}
+exports.coordinatesEqual = coordinatesEqual;

frontend/node_modules/@turf/polygonize/package.json

@@ -0,0 +1,71 @@
+{
+  "name": "@turf/polygonize",
+  "version": "6.5.0",
+  "description": "turf polygonize module",
+  "author": "Turf Authors",
+  "contributors": [
+    "Nicolas Cisco <@nickcis>",
+    "Denis Carriere <@DenisCarriere>"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/Turfjs/turf/issues"
+  },
+  "homepage": "https://github.com/Turfjs/turf",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/Turfjs/turf.git"
+  },
+  "funding": "https://opencollective.com/turf",
+  "publishConfig": {
+    "access": "public"
+  },
+  "keywords": [
+    "turf",
+    "geojson",
+    "gis",
+    "polygonize"
+  ],
+  "main": "dist/js/index.js",
+  "module": "dist/es/index.js",
+  "exports": {
+    "./package.json": "./package.json",
+    ".": {
+      "import": "./dist/es/index.js",
+      "require": "./dist/js/index.js"
+    }
+  },
+  "types": "dist/js/index.d.ts",
+  "sideEffects": false,
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "bench": "ts-node bench.js",
+    "build": "npm-run-all build:*",
+    "build:es": "tsc --outDir dist/es --module esnext --declaration false && echo '{\"type\":\"module\"}' > dist/es/package.json",
+    "build:js": "tsc",
+    "docs": "node ../../scripts/generate-readmes",
+    "test": "npm-run-all test:*",
+    "test:tape": "ts-node -r esm test.js",
+    "test:types": "tsc --esModuleInterop --noEmit types.ts"
+  },
+  "devDependencies": {
+    "benchmark": "*",
+    "load-json-file": "*",
+    "npm-run-all": "*",
+    "rollup": "*",
+    "tape": "*",
+    "ts-node": "*",
+    "typescript": "*",
+    "write-json-file": "*"
+  },
+  "dependencies": {
+    "@turf/boolean-point-in-polygon": "^6.5.0",
+    "@turf/envelope": "^6.5.0",
+    "@turf/helpers": "^6.5.0",
+    "@turf/invariant": "^6.5.0",
+    "@turf/meta": "^6.5.0"
+  },
+  "gitHead": "5375941072b90d489389db22b43bfe809d5e451e"
+}