Southern
California Metric Maps HUCs - 10 digit U_INDEX Human Land Use RHUM0 Stream Corridor RHUM30 30 Meter RHUM90 90 Meter N_INDEX Natural Land Use RNAT0 Stream Corridor RNAT30 30 Meter RNAT90 90 Meter PBAR Barren RBAR0 Stream Corridor RBAR30 30 Meter RBAR90 90 Meter PAGT Agriculture RAGT0 Stream Corridor RAGT30 30 Meter RAGT90 90 Meter PAGC Cropland RAGC0 Stream Corridor RAGC30 30 Meter RAGC90 90 Meter PAGP Pasture RAGP0 Stream Corridor RAGP30 30 Meter RAGP90 90 Meter PURB Urban RURB0 Stream Corridor RURB30 30 Meter RURB90 90 Meter PWETL Wetland RWETL0 Stream Corridor RWETL30 30 Meter RWETL90 90 Meter PFOR Forest RFOR0 Stream Corridor RFOR30 30 Meter RFOR90 90 Meter AGCSL3 - Steep Slopes STRMLEN Stream Length STRMDENS Stream Density RDLEN Road Length RDLENCINTE Interstates RDLENCHIGH Highways RDLENCROAD Surface Road RDDENS Road Density RDDENSCINT Interstates RDDENSCHIG Highways RDDENSCROA Surface Road FNUMBER Forest Patches FPATDENS Forest Density FLARGEST Largest Forest FAVGSIZE Average Forest PLGP Proportion of Forest FEDGE210 Forest Edge FCORE210 Forest Interior FEA210 Forest Edge/Total PFF9 Forest Cell PFPTCH9 Watershed/Patch Forest PFTRAN9 Watershed/Transitional PFEDGE9 Watershed/Edge Forest PFPERF9 Watershed/Perforated PFINTR9 Watershed/Interior REGFAC_COUNT Regulated Facilities MINES_COUNT Mines COWDENS Cow Grazing Intensity POPDENS Population Density |
U_INDEX - Percentage of all human land use The U-Index (human use index) metric is the percentage of land
cover cells located within the 1 km grid cell reporting unit that
are classified as either agriculture, urban, or non-natural barren
(transitional and mines/quarries) to the total number of cells inside
the grid cell boundary minus those cells classified as water (total
land area). This gives the proportion of land area in the grid cell
that is influenced by human activity. High U-Index values depict
areas in which land use practices could have profound effects on
wildlife habitat, soil erosion and water quality. The values seen
here are generally lower than in the central United States and areas
along the eastern seaboard of the United States. |