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U.S. Geological Survey - Gap Analysis Project Species Range Maps CONUS_2001


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U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2018, U.S.Geological Survey - Gap Analysis Project Species Range Maps CONUS_2001: U.S. Geological Survey data release,


GAP species range data are coarse representations of the total areal extent a species occupies, in other words the geographic limits within which a species can be found (Morrison and Hall 2002). These data provide the geographic extent within which the USGS Gap Analysis Project delineates areas of suitable habitat for terrestrial vertebrate species in their species' habitat maps. The range maps are created by attributing a vector file derived from the 12-digit Hydrologic Unit Dataset (USDA NRCS 2009). Modifications to that dataset are described here. Attribution of the season range for each species was based on the literature and online sources (See Cross Reference section of the metadata). Attribution for each hydrologic unit within [...]

Child Items (1719)


Point of Contact :
GAP Team
Originator :
U.S. Geological Survey - Gap Analysis Project
Metadata Contact :
GAP Team
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Core Science Systems
SDC Data Owner :
Science Analytics and Synthesis

Attached Files

Click on title to download individual files attached to this item.

“Range data for amphibians”
40.86 MB text/plain
“Range data for reptiles”
71.51 MB text/plain
“Range data for mammals”
153.67 MB text/plain
“Range data for birds”
583.67 MB text/plain
“Metadata Source Information for Species Items”
348.74 KB text/csv


The mission of the U.S. Geological Survey Gap Analysis Project (GAP) is to provide state, regional and national biodiversity assessments of the conservation status of native vertebrate species and natural land cover types and to facilitate the application of this information to land management activities. Species distribution models are used to conduct a biodiversity assessment for species across the U.S. The goal of GAP is to keep common species common by identifying species and plant communities not adequately represented in existing conservation lands. Common species are those not currently threatened with extinction. By providing these data, land managers and policy makers can make better-informed decisions when identifying priority areas for conservation.

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DOI doi:10.5066/F7Q81B3R

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