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Track: Natural Resources and Conservation
Karen Joy Dorweiler
Bureau of Land Management
Box 2000
N. Palm Springs, CA 92256
Telephone: 619-251-4822
Fax: 619-251-4899
E-mail: kjay@mci2000.com
The Development and Verification of a Habitat Map Using ArcInfo
This project was undertaken on behalf of the Northern and Eastern Colorado Desert Coordinated Management Plan for the United States Bureau of Land Management. The study area is comprised of 5.2 million acres in southeast California. The habitat map was developed using ARCGRID. The intention was to produce a map that reflected not only plant communities, but also habitat useful to wildlife. Data from California GAP Analysis, satellite imagery, and GPS collection were combined to create the final grid. The resulting grid identified 11 communities. To assess the accuracy of the grid, random points were selected in each community. Factors considered in point selection were the size of the area, relative importance/rarity of the community, and quality of the input data. These points were then plotted on the overlay maps for use in field verification. This paper will outline techniques for combining data in ARCGRID, selection of random points in ArcInfo, and the verification of data. A summary of
communities and sample sizes will be included. The paper will also discuss the preliminary results of the field surveys.
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