ExpertGPS shows your GPS data on USGS topo maps, using a UTM projection. As you move around the map, ExpertGPS will retrieve map data over the Internet and display it on your map. The map server that ExpertGPS uses has topo maps for all 50 states in the US.
Working with Maps
Read about the basic commands for interacting with all of the maps in ExpertGPS.
Showing a Topo Map
To show a Topo Map, click on the .
Internet Map Retrieval
To allow ExpertGPS to retrieve topo maps over your Internet connection, click on the .
Drag the 
Retrieve Maps Tool over a regional
map to queue up all of the topo maps in that area for retrieval over your Internet connection.
How Old is this Topo Map?
USGS topo maps are updated when major changes to the landscape occur. The digitized topo maps that ExpertGPS uses are the latest available from USGS.
To determine when a topo map was published, do the following:
- Select a waypoint on the map.
- On the , click .
- The Online Waypoint Viewer will appear.
- Click the Microsoft TerraServer link in the Topo Map section. The topo map's name and date of publication are listed above the map.
