You can now include advertising on your Google map

Google now welcomes and encourages you to monetize your maps mashup through advertising. The map API now provides an ads layer feature via the GAdsManager class, that can display context-relevant ads in an ads layer on your Google map.

These are the same type of ads that appear on some searches on the official Google Maps site. By providing your AdSense for Content publisher ID to GAdsManager, you'll enable the ads layer and make money each time a user clicks on the link in an ad's info window.

You can also add AdSense ad units on the same page as your map mashup, outside of the map, to help your site earn money.