It is often important to have geographical information about a specific place. Quantum GIS is one of the programs that can help you.
Quantum GIS is an open source Geographic Information System that can manage databases, vector and raster images. It can retrieve data from GPS points and make geo-referencing with ground reference. It also works with python scripts and those that are developed in C + +. It takes a little time to master it and knowledge in GIS software is necessary to exploit it.