Fig. 1
From: Spatiotemporal exposure modeling of ambient erythemal ultraviolet radiation
Regions used for ATP residual kriging and UVMRP monitoring stations. Top left: Nine regions created using segmentation within which ATP residual kriging was conducted. Bottom left: Region 1, northwest; 2, Pacific mid-west; 3, southwest; 4, north central; 5, mid-central; 6, south central; 7, northeast; 8, mid-Atlantic; 9, southeast. Right: U.S. Department of Agriculture (USDA) UV-B Monitoring and Research Program (UVMRP) monitoring stations (n = 31) used as the gold standard in model validation