The National Renewable Energy Laboratory (NREL) creates maps of America’s renewable energy resources. Broken down into the major forms — solar, wind, biomass and geothermal — they are an indispensable guide for regions trying to figure out their energy mix, and a fascinating lens through which to view our natural resources.
Also see their GIS based technical report.
These are technology specific estimates of energy generation potential based on renewable resource availabilityand quality, technical system performance, topographic limitations, environmental, and land-use constraints only.