Service Provider DescriptionDIVA-GIS is a free mapping program, sometimes called geographic information system (GIS), that can be used for many different purposes. It is particularly useful for mapping and analyzing biodiversity data, such as the distribution of species, or other 'point-distributions'.
With DIVA-GIS you can:
Make maps of the world or of a very small place, integrating, for example, state boundaries, rivers, a satellite image, and the locations of sites where an animal species was observed.
Make grid maps of the distribution of biological diversity, to identify hotspots and areas that have complementary levels of diversity.
Map and query climate data. Predict species distributions using the BIOCLIM or DOMAIN models. Create ESRI shapefiles, import and export grid data, and much more!
You can also download AVID-GIS (version 0.3), the command line version of DIVA-GIS. Or have a look at a simple implementation of Google Maps.
Summary provided by http://www.diva-gis.org/