MarkerManager v3 v1.0 ReferenceMarker manager is an interface between the map and the user, designed to manage adding and removing many points when the viewport changes. How it Works: The MarkerManager places its markers onto a grid, similar to the map tiles. When the user moves the viewport, it computes which grid cells have entered or left the viewport, and shows or hides all the markers in those cells. (If the users scrolls
