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| To compute the Percent Impervious for each sub-basin of your MODRAT model, you must read in a land use data layer. Land use data is generally stored in a GIS, the best way to read it into WMS is though a Shapefile. To import land use data for use with MODRAT, create a [[WMS:Land Use|Land Use Coverage]], then [[WMS:Importing Shapefiles|import the polygon file]] and ensure that the Percent Impervious field (often called IMPERV_ by the LACDPW) is assigned to LA County Soil land use field of WMS. Once the land use data is present in WMS, you can compute and assign % impervious using the '''[[WMS:Importing Shapefiles|Map Attributes]]''' command from the '''MODRAT''' menu.
| | #redirect [[WMS:MODRAT_Edit_Parameters#Percent_Impervious_Land_Use]] |
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| ==Related Topics==
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| * [[WMS:MODRAT Impervious Area|Impervious Area]]
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| * [[WMS:Using GIS Data to Map Parameters|Using GIS Data to Map Parameters]]
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| * [[WMS:MODRAT Soil Number|Soil Number]]
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| * [[WMS:MODRAT Rainfall Depth|Rainfall Depth]]
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| {{WMSMain}}
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