Legacy GeoDa is a free software program that serves as an introduction to spatial data analysis. It is the flagship program of the GeoDa Center, following a long line of software tools developed by Dr. Luc Anselin. It is designed to implement techniques for exploratory spatial data analysis (ESDA) on lattice data (points and polygons). The free program provides a user friendly and graphical interface to methods of descriptive spatial data analysis, such as spatial autocorrelation statistics, as well as basic spatial regression functionality. The latest version contains several new features such as a cartogram, a refined map movie, parallel coordinate plot, 3D visualization, conditional plots (and maps) and spatial regression.
Since its initial release in February 2003, GeoDa's user numbers have increased exponentially. In the five years since its launch, more than 36,000 people downloaded GeoDa across the globe, including lab users at universities such as Harvard, MIT, and Cornell. More than 1,000 users subscribe to the Openspace listserv associated with GeoDa. The user community and press embraced the program enthusiastically, calling it a "hugely important analytic tool," a "very fine piece of software," an "exciting development" and more.
The development of GeoDa and related materials has been primarily supported by the U.S. National Science Foundation/ the Center for Spatially Integrated Social Science (CSISS) (Grant BCS-9978058).