Source data for deep EGS includes temperature at depth from 3 to 10 km provided by Southern Methodist University Geothermal Laboratory (Blackwell and Richards 2009) and analyses (for regions with temperatures >= 150 degrees C) performed by NREL (2011). Class values reflect relative favorability with 1 being most favorable 5 being least favorable and 999 not having been assessed due to temperatures less than 150 degrees C at 10 km depth.