GPS for Dummies.pdf - Engineering Surveyor

Chapter 13: On the Ground with Maptech Terrain Navigator217Figure 13-4:A trailmap withwaypointsand trackcan be sentto your GPSreceiver.You can upload data from topographic map programs to your GPS receiveror download waypoints, routes, and tracks from your GPS receiver to themap program. For example, you could overlay a track you recorded with yourGPS receiver on the electronic map to see where you had been. Check the mapprogram documentation or online help to find out how to interface your GPSreceiver. Chapter 9 has a number of hints and tips for connecting GPS receiversto PCs.Understanding Terrain ElevationUnless you’ve had some experience reading topographic maps, trying to figureout terrain elevation based on contour lines can be challenging. (Contourlines are a way of representing height on a map.) Terrain Navigator has twofeatures — 3-D View and the Terrain Profile tool — that help you better visualizewhere the land starts to get steep or flatten. You can use the map fromearlier sections of this chapter to see just how much of a climb you’re in for.