Impervious Surface Analysis Tool

NOAA Office for Coastal Management


This downloadable suite of easy-to-use scripts for ArcGIS calculates the percentage of impervious surface area within user-selected geographic areas such as watersheds, municipalities, and subdivisions.

Requires ArcGIS 10.x and Spatial Analyst Extension


  • Calculate the percent impervious area and total impervious surface area for areas of interest
  • Categorize results to represent conditions of good, fair, and poor water quality
  • Predict how different land management scenarios might impact local water quality

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