Parameter name: map_overlays
The shapes created with the “My Map Overlays” tool may be referenced with the &map_overlays= parameter. Multiple overlays may be specified in a comma-separated list of map overlay API keys.
To obtain the map overlay API key of an overlay, follow these steps:
- Visit the My Map Overlays menu item in the Preferences menu, and select the overlay containing the desired shape.
- Click the desired shape, then click the edit link, as shown below:
- Click the “Show API Key” link that appears:
- The map overlay API key will appear. Use this as the value for the map_overlays parameter.