http://tags.library.upenn.edu/tag/data+open_source_gis PennTags Feed http://tags.library.upenn.edu/makerecord/url/994 http://tags.library.upenn.edu/makerecord/url/994 Geographic Information Systems (GIS) software relies on data sets that cover the whole planet. To cope with the flood of GIS data and their formats, programmers have created several open source libraries and GIS suites. This article gives a short introduction to the range and depth of GIS tools and libraries available for UNIX® and Linux®.