diff --git a/frontend/src/pages/Watering/Watering.js b/frontend/src/pages/Watering/Watering.js
index 48088a0..a4d017b 100644
--- a/frontend/src/pages/Watering/Watering.js
+++ b/frontend/src/pages/Watering/Watering.js
@@ -305,7 +305,16 @@ const Watering = () => {
                       )
                     )}
                     {cov?.kind==='rect' && (
-                      <Rectangle bounds={[[pt.lat - (cov.width/2)*0.00000274, pt.lng - (cov.length/2)*0.0000036], [pt.lat + (cov.width/2)*0.00000274, pt.lng + (cov.length/2)*0.0000036]]} pathOptions={{ color:'#2563eb', fillOpacity:0.2 }} />
+                      <Rectangle
+                        bounds={[[
+                          Number(pt.lat) - (cov.width/2)*0.00000274,
+                          Number(pt.lng) - (cov.length/2)*0.0000036
+                        ], [
+                          Number(pt.lat) + (cov.width/2)*0.00000274,
+                          Number(pt.lng) + (cov.length/2)*0.0000036
+                        ]]}
+                        pathOptions={{ color:'#2563eb', fillOpacity:0.2 }}
+                      />
                     )}
                   </React.Fragment>
                 );