GeoComm contains the same data as the USGS Seamless server but it is presented in a different way. Instead of entering in the coordinates for your location you download the tile your course is located in. The tiles are sorted by state, county and city.
To get started you need to register for a free account on the GeoComm Site. Once you've done that you're ready to start looking for the DEM. If you know the town or city where your course is located try doing a Google search to find the county in which it resides. Another thing you can try is to gradually zoom out in Google Earth until it displays the counties.
If your coordinates are off the screen when you load the DEM tile in 3DEM then you have the wrong tile and you'll need to go back to the GeoComm Site and try a different one. In some cases your course may reside on two or more DEM tiles. To open multiple files in 3DEM, select and hold down the CTRL key. 3DEM assembles all of the selected files together.
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