OGR GTM Driver
GPSTrackMaker is a program that is extensively used in Brazil on a project called Tracksource. This community makes maps for Brazilian cities and distributes them freely for using on GPS devices. The project is collaborative and the users develop their own maps.
Each developer is responsible for one or more cities. Some developers receive the maps from their city hall office (this is my case); however, the municipal government doesn't give the maps on our preferable format. The developer has to convert it. That's why I have implemented this driver. You can download my implementation from here. Note that this is not the latest version. A more up-to-date version can be found on GDAL/OGR repository.
