If you've ever zoomed around the globe with Google Earth, you know how much fun it can be to work with geospatial data. When I need a diversion, I often fire up Google Earth and float above the ...

James Gray continues his review of desktop Geographic Information System (GIS) applications with an introduction to the concepts needed to get started with the user-friendly, open-source Quantum GIS.

A map can turn a flat table of coordinates into something you can read in seconds, and that is the real value of geospatial data visualization tools. They help you convert geographic data and ...