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I performed a supervised land-use classification with Erdas. Landsat data was used in ArcGIS to Digitize urban areas as polygon shapefile. I want to insert these polygons into the land-use raster data. How can I do this with ArcGIS?

  • Thank you for helps. I solved to problem converting raster to shapefile and UPDATE my vectors into land use map. – Bahadır ALTÜRK Jul 22 '14 at 15:00
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Try the following workflow:

  1. Add a new field in your polygon layer "Value". Make sure the value is > any of the land use values.
  2. Use Polygon to Raster (Conversion). Make sure to specify the value field you created in step 1. Also make sure to specify the same cell size as your land use raster.
  3. Use Cell Statistics (Spatial Analyst) with a "MAXIMUM" statistic to combine the two raster datasets. In the environment tab on the tool GUI, specify the land use raster as the "Processing Extent".

Alternative approaches include utilizing Mosaic to New Raster or Con.

  • Hi Aaron i tried cell statistic with a MAXIMUM but when process is finished only raster polygons stay. There is no land use map. – Bahadır ALTÜRK Jul 19 '14 at 17:02
  • If you give me a mail adress i will send you a land use image that i want. Maybe it is better to understand. – Bahadır ALTÜRK Jul 19 '14 at 17:04
  • You need to 1) convert your polygons to raster (choose a large value) 2) Add both rasters to Cell Statistics 3) make sure your set the processing extent in the tool environment tab. Did you do all of these steps? – Aaron Jul 19 '14 at 17:13

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