Follow the steps below to view GPS coordinates on fully featured maps.
1. Download and install Quantum GIS
in Ubuntu, go to Applications > Software Center > QGIS
for Windows, Download the .exe file from here and install it.
2. After installation, start QGIS (Ubuntu - Applications > Science, Windows has a desktop shortcut installed) and go to Plugins > Fetch all python plugins and install all available plugins.
3. Create a folder on your computer called GIS
4. Click the link and download this .zip folder - extract and place the contents into your new GIS folder. Do not put folders in your GIS folder - only the contents.
5. In QGIS, go to Layer > Add Raster Layer > navigate to your GIS folder > select the Index Image.jpg file.
6. Maximise the QGIS display area, right click on the top, grey toolbars and deselect everything except: Layers, Map Navigation.
Next, click "Zoom Full".
Your screen should now look like this.
Click File > Save Project As and save to desktop. In Windows, now delete all other QGIS desktop shortcuts as this will be your program start-point.
To view available maps in QGIS, scroll down this page and download the .zip folder - extract the files to your GIS folder. Add the "map.jpg" to QGIS in the same way you added the Index Image above. In the Layers window, click and drag the Index Image and place it at the bottom of the list of maps.
Zoom in using the + or - symbols and clicking on the map, or by selecting + and click/drag/select a square on the map to zoom directly to that square.
Example images from QGIS CambodiaMaps - the green dots are the individual GPS readings making up the trails.
JICA 1:100,000 series
JICA 1:100,000 and Military 1:50,000 alternately
Download the maps here