The Arizona Sonora Pilot Project


The Semiarid Grasslands



The semiarid grasslands of the Southwest have been selected to illustrate some of the GIS techniques used to display spatial information.

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Geographic Information Systems (GIS) provide spatial information that describes a particular area in a variety of different formats.



The Region

Perennial Arivaca Creek flows west to the Altar Valley with the Baboquavari Mountains on the horizon.

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GIS Database Development

The analogy of a water utility is used to clarify some basic GIS database development concepts.

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To see an example of GIS database development: Pima County Riparian Habitat


Database Development Issues

There are a number of issues in the area of database development.

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Binational Cooperation

Binational cooperation may be accomplished in many ways.

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John Regan
Pima County Department of Transportation
Geographic Information Services Division
201 N. Stone Ave., 9th Floor
Tucson, Arizona 85701-1207

Pima County DOT Geographic Information Services Division site

Phone: (520)740-6670
Fax: (520)798-3429

Please send comments or suggestions to e-mail address