GPS for Dummies.pdf - Engineering Surveyor

222Part III: Digital Mapping on Your ComputerDeLorme topographic mapping products can interface with GPS receivers,display 3-D maps, search for locations, provide elevation profiles, and planfor trips just like other map programs. These two unique features in the programare especially useful: Satellite imagery: DeLorme sells 10-meter resolution color satellite datafor each state. When you use the images with DeLorme mapping products,you can view the satellite photos side by side with topographic maps in2-D or 3-D. (See an example produced by Topo USA in Figure 13-7.) Mural printing: If you need to produce a large map for a presentation,the programs support printing mural maps that are up to three pageshigh by three pages wide that you can join to make a large map.To read more about DeLorme’s mapping programs, visit www.delorme.com.Topo USATopo USA provides 1:100,000 scale topographic maps of the entire UnitedStates (for around the same price as a collection of 1:24,000 scale digitalmaps for a single state). Remember, you don’t get as much detail as youwould with a 1:24,000 scale map, but there’s enough detail for rudimentarynavigation and to use as a general reference.Figure 13-7:3-D satelliteimage withtopographicmap displayedinTopo USA.