fix sq ft again

backend/src/routes/properties.js

@@ -16,21 +16,23 @@ const calculatePolygonArea = (coordinates) => {
   console.log('Calculating area for coordinates:', coordinates);
   
   // Shoelace formula for polygon area
+  // Coordinates are in [latitude, longitude] format (not GeoJSON standard)
   let area = 0;
   const n = coordinates.length;
   
   for (let i = 0; i < n; i++) {
     const j = (i + 1) % n;
-    area += coordinates[i][0] * coordinates[j][1];
-    area -= coordinates[j][0] * coordinates[i][1];
+    // coordinates[i][0] = latitude, coordinates[i][1] = longitude
+    area += coordinates[i][1] * coordinates[j][0]; // lng * lat
+    area -= coordinates[j][1] * coordinates[i][0]; // lng * lat
   }
   
   area = Math.abs(area) / 2;
   console.log('Raw shoelace area (in deg²):', area);
   
   // Convert from decimal degrees to square feet
-  // Assuming coordinates are [longitude, latitude] (GeoJSON standard)
-  const avgLat = coordinates.reduce((sum, coord) => sum + coord[1], 0) / n;
+  // coordinates are [latitude, longitude] format
+  const avgLat = coordinates.reduce((sum, coord) => sum + coord[0], 0) / n; // coord[0] is latitude
   console.log('Average latitude:', avgLat);
   
   // More accurate conversion using Haversine-based approach