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Q: How do I calculate statistics for a raster within the zones of another data layer in ArcGIS?

Answer

The Zonal Statistics as Table geoprocessing tool allows a user to calculate statistics from a raster within zones from a vector layer. For example, one could use a digital elevation model and a state boundaries layer to find the average elevation in each US state.

  1. In the ArcToolbox, open Spatial Analyst Tools > Zonal > Zonal Statistics as Table
    1. Input raster or feature zone data: boundary layer
    2. Zone field: unique zone identifier (e.g. name, unique ID)
    3. Input value raster: raster layer for whose value you want statistics
    4. Statistics type: by default, this tool calculates all statistics
  2. Join the table to the zone using the field you specified in 2b.

Further Resources

See Also

Created by MIT GIS Services. Email gishelp(at)mit.edu for more assistance.

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Last Modified:

August 04, 2020

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