I want to build a map that has multiple control selectors above the map. When one icon is selected, it prints the relevant markers all over the globe on the map.
If one of the control selectors appears at any one location it just shows one marker, but if two or more different control selectors are clicked on and they share the same location, the marker is modified and expands.
In essence this is something "like a heatmap" function, but not quite.
Anyone had a similar project that can relate and perhaps set me on the right path?