Map markers that are overlapping each other should be split when clicked.

[jesserosato]

If multiple locations have the same coordinates, the user is only able to see a single map marker at those coordinates. Some visual indication should be given that multiple locations are available at those coordinates.

Look at Leaflet Cluster Angular Directive, or Overlapping Marker Spiderfier: https://github.com/jawj/OverlappingMarkerSpiderfier-Leaflet