How to Make Your Own Maps With a GPS Navigation System |
Most Global Positioning System (GPS) navigation devices are already equipped with built-in maps. Many of these maps lack sufficient coverage and detail, but you can make your own maps by following a few simple steps
Instructions 1 Download the GPS TrackMaker software, a free program available at the GPS TrackMaker Web site (see Resources below).
2 Open the map image and launch the TrackMaker program. From the "Tools" menu, select "Insert Map Image" and select the image you wish to edit.
3.Calibrate the map by clicking the "Map Adjust Tool" button and moving the cursor so the crosshairs intersect at the latitude -1 and longitude -91 margin labels. You can also click to insert the coordinates. Repeat the instructions for latitude 0 and longitude -90 and save your work in the GPS Track Maker format (.gem).
4 Import map data from the Digital Chart of the World Web site (see Resources below) and select a country. Click "Download Data" and select layers such as roads or drainage. Press "Continue," then "Compute Data" and wait for the files.
5 Import the data to the GPS TrackMaker program. From the "File Menu," choose "Merge File" and select one of the layers you downloaded. Click "OK" and save your work. Repeat the procedure for every layer you downloaded.
6 Select and delete unnecessary tracks and save your file.
7 Transfer the map to your GPS receiver. Download tracks and waypoints using the GPS Interface tool found on the main menu of your GPS unit.
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