Bluestem grass, one of the tall grasses found in the prairie

Text Box: Welcome!

Robert W Pendergrass TallgrassGIS

1914 W Ithica Street

Broken Arrow OK 74012

To contact:

Phone: 918-706-1523


TallgrassGIS is dedicated to bringing innovative and quality spatial and quantitative analysis to environmental organizations, nonprofit organizations, public interest groups as well as to governmental agencies.


Using the tools of spatial and quantitative analysis, TallgrassGIS is committed to helping your organization in making decisions having a spatial aspect; to solve problems and answer questions and; to provide understanding of the natural and human environments.

TallgrassGIS is located in Broken Arrow, a suburb of Tulsa Oklahoma — situated at the Southwestern edge of the Ozarks and the Eastern edge of  one of the last remnants of the American Tallgrass Prairie.