CTDB FormatPolygon Attribute Table (cont.)

• The PAT has four default columns:

  • Column 0: The traditional mobility word containing the SIMNET "soil type", the CCTT mobility index, and the characteristics flags is always the zero index column of the PAT to support backward compatibility.
  • Column 1: USGS soil type - The FACC code is STP.
  • Column 2: Surface Material Category - The FACC code is SMC.
  • Column 3: Soil Moisture Content - The FACC code is SWC. The FACC category for this stores unknown, dry, moist, wet, and frozen.

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