Western Geographic Science Center

U.S. Geological Survey
Open-File Report 2008-1283
Version 1.0

Elevation Derivatives for Mojave Desert Tortoise Habitat Models

By Cynthia S.A. Wallace and Leila Gass



This report describes the methods used to derive various elevation-derivative grids that were inputted to the Mojave Desert Tortoise Habitat model (L. Gass and others, unpub. data). These grids, which capture information on surface roughness and topographic characteristics, are a subset of the environmental datasets evaluated for the tortoise habitat model. This habitat model is of major importance to the U.S. Fish and Wildlife Service, which is charged with management of this threatened population, including relocating displaced tortoises to areas identified as suitable habitat.

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