GLB_DLY_PREC - GeoTiFF (mm/day) To view the GeoTiff in ArcGIS: Go to "Symbology" Classify the data Exclude the missing value (which is -999.0) The CPC Unified Global Daily Precipitation Analysis is defined by Optimal Interpolation (OI) of gauge observations. The gauge observations are from the GTS and the CPC unified daily gauge data sets over CONUS, Mexico, and S. America. The data resolution is: 0.5x0.5 degree Note: If you have any questions regarding this GeoTiff data, please contact: Viviane.Silva@noaa.gov