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Alaska Gap Analysis Project

Distribution models for the Alaska Gap Analysis Project (AKGAP) were developed over 10 years ago and have not been updated since. Although best data was used at the time, the available data was generally poor quality, especially the vegetation data. Numerous changes have occurred since the completion of AKGAP: changes in our understanding of species' ranges, changes in taxonomy, and changes in what we consider to be the best tools and data for creating distribution models using presence-only data. For those reasons, we consider the AKGAP models to be deprecated and we caution against using them, other than for reproduction of past analyses. The AKGAP final report and species atlas are available for download through this site. For acquisition of the raster distribution models, please email us to discuss appropriate uses of the data.

The species distribution modeling component of AKGAP began in September 2007 and was coordinated by the Alaska Natural Heritage Program at the University of Alaska Anchorage. Other project partners included the Environmental Science & Geography Programs & Spatial Ecosystem Analysis Lab (SEALAB) at the University of Alaska Southeast and the EWHALE lab-Biology and Wildlife Department at the University of Alaska Fairbanks. The project produced spatially explicit models to predict the range and distribution of terrestrial vertebrate species in Alaska to support analysis of conservation status.

Data and Resources

Release Date
Spatial / Geographical Coverage Area
POLYGON ((-156.6386783123 71.585738133899, -166.55274510384 68.853611834049, -166.55274510384 68.105694447737, -162.9668033123 66.895167232095, -166.55274510384 66.505818307201, -167.8183722496 65.592531731131, -166.27148866653 64.373666477618, -165.84962010384 62.552353775768, -167.25587010384 59.914833725541, -163.38868260384 58.694640424082, -160.64648866653 57.278452666028, -171.47462010384 53.31972142003, -177.16992616653 52.685044345732, -188.70118260384 53.65440718817, -190.0371158123 52.51421155161, -180.26368260384 51.387555601237, -169.2949283123 52.342725130922, -160.0839972496 54.845624671676, -152.56055116653 56.781018448144, -150.45117616653 59.09420532142, -146.30274295807 59.950061202702, -140.3964972496 59.381902071033, -135.4746222496 56.626627028786, -132.80274510384 53.737668749509, -129.70899939537 54.683360340598, -129.14648652077 56.041978954153, -135.26368260384 60.12564079707, -137.44336366653 59.808923935235, -139.83399510384 60.921359279009, -140.67774295807 70.038224508373))
Spatial / Geographical Coverage Location
60 m
Alaska Center for Conservation Science
Contact Name
Timm Nawrocki
Contact Email
Public Access Level