I use and develop geospatial technologies for research on the long-term spatial dynamics of socioecological systems and teach a graduate course in spatial technologies for research. I am also a member of the GRASS GIS development team and Project Steering Committee, and a co-investigator on a new National Science Foundation project to grow the GRASS user and developer communities.

The Geographic Resources Analysis Support System, GRASS GIS, is a geographic information system (GIS) used for data management, image processing, graphics production, spatial modeling, and visualization of many types of geospatial data. It is free open-source software/Open released under GNU General Public License (GPL). GRASS is member project of the Open Source Geospatial Foundation.

Originally developed by the U.S. Army Construction Engineering Research Laboratories (USA-CERL, 1982-1995), a branch of the US Army Corp of Engineers, as a tool for land management and environmental planning by the military, GRASS has evolved into a powerful software suite, with a wide range of applications in many different areas of scientific research.

GRASS is currently used in academic and commercial settings around the world, as well as many governmental agencies including NASA, NOAA, USDA, DLR, CSIRO, the National Park Service, the U.S. Census Bureau, USGS, and many environmental consulting companies.

GRASS interface GRASS network GRASS 3D
Images from GRASS GIS

I maintain GRASS for Macintosh apps. Other GRASS information and software can be found at the…

Other open source geospatial software can be found at the OSGeo Foundation site