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 and open-source software (FOSS) 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 on public lands, GRASS has evolved into a powerful software suite, with a wide range of applications in many different areas of scientific research.

GRASS currently is used in research, academic, government, non-profit, and private sector settings around the world. In the US, governmental agencies using GRASS include NASA, NOAA, USDA, DLR, the National Park Service, the U.S. Census Bureau, and USGS.

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