Avoid bbox too small and camera too close to the ground in NominatimS…

…earch.

lib/ViewModels/NominatimSearchProviderViewModel.js

@@ -152,10 +152,41 @@ NominatimSearchProviderViewModel.prototype.search = function(searchText) {
 
 function createZoomToFunction(viewModel, resource) {
     var bbox = resource.boundingbox;
-    var south = bbox[0];
-    var west = bbox[2];
-    var north = bbox[1];
-    var east = bbox[3];
+
+    // Parse string to float
+    var south = parseFloat(bbox[0]);
+    var west = parseFloat(bbox[2]);
+    var north = parseFloat(bbox[1]);
+    var east = parseFloat(bbox[3]);
+
+    // Avoids the bbox is too small and camera too close to the ground
+    const delta = 0.001;
+    if(Math.abs(south - north) <= delta)
+    {
+        if(south > north)
+        {
+            south += delta;
+            north -= delta;
+        }
+        else
+        {
+            south -= delta;
+            north += delta;
+        }
+    }
+    if(Math.abs(east - west) <= delta)
+    {
+        if(east > west)
+        {
+            east += delta;
+            west -= delta;
+        }
+        else
+        {
+            east -= delta;
+            west += delta;
+        }
+    } 
 
     var rectangle = Rectangle.fromDegrees(west, south, east, north);