Calculate a point on the map in Mercator Projection for a given coordinate at the specified zoom scale.
Return
Returns a point on the map in Mercator projection.
Parameters
coordinate
The longitude-latitude pair for which to return the value.
zoomScale
The current zoom factor (2 ^ Zoom level) applied on the map, is used to calculate the world size as tileSize * zoomScale (i.e., 512 * 2 ^ Zoom level) where tileSize is the width of a tile in pixels.