Total Terrestrial Gamma Activity Polygons for an Aerial Radiological Survey of Abandoned Uranium Mines, Navajo Nation, 1994-1999, USEPA and USDOE

This polygon shapefile presents ranges of ground surface exposure rate from total terrestrial gamma activity, and calculated from aerial gross count data (all gamma...本多边形形状文件（polygon shapefile）展示了源自陆地总伽马辐射活度的地面照射率范围，该范围通过航空总计数数据（涵盖所有伽马……）计算得到。