Microsoft has launched MSN Virtual Earth a detailed online satellite mapping service. Like Google Maps, Virtual Earth provides both road maps and aerial photos of the destination being viewed. You can also scroll along the map which is very helpful for someone trying to figure out directions. A "scratch pad" is provided that helps you store some of your previous searches. The service also includes the Virtual Earth URL application programming interface (API) so you can add Virtual Earth maps and local search results to your Web applications.