Google Maps Overlay Source Code   This program will teach you on how to use google maps overlay. Overlays are objects on the map that are bound to latitude/longitude coordinates. Google Maps has several types of overlays: Marker - Single locations on a map. Markers can also display custom icon images Polyline - Series of straight lines on a map Polygon - Series of straight lines on a map, and the shape is "closed" Circle and Rectangle Info Windows - Displays content within a popup balloon on top of a map Custom overlays Instructions: 1. Download the source code. [...]