U.S. Geological Survey Gap Analysis Program (USGS-GAP)

AScIS assists in helping the USGS promote conservation by providing broad geographic information on biological diversity to resource managers, planners, and policy makers who can use the data to make informed decisions. AScIS compiled a list of sources searched, a list of environmental variables that could be derived from existing sources, and a list of environmental variables. AScIS used these variables to develop environmental data in support of Species Modeling .