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I have a polygon grid file and want to clip my raster imagery to the shapes outlined by it. I am using arcmap and was wondering if there was a tool directly for this? I would like to also be able to name each resulting raster for the polygon feature it was clipped to.

  • Are you open to using a python script that works in ArcMap 10 or above? I wrote something a while back that does this very thing. Also what do you mean by a polygon grid file? Is it a polygon or a grid of numeric zones? – jbchurchill Jul 21 '15 at 13:56
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I would use model builder for this. Use the feature iterator to cycle through each polygon and feed that into the clip raster tool. You would use in-line variable substitution to pass the polygon ID or unique name you used in the iterator to the output name of your new clipped raster.

Here is the model:

Model

If you don't know anything about model builder, time to read the Help file!

  • thanks. i know model builder, i was just wondering there was a tool that did it without designing my own. – gomapping Jul 20 '15 at 17:32
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    Surely 'Extract by Mask (SA)' would be better than Clip. Clip creates a rectangular polygon defined by an extent but Extract by Mask will extract an irregular polygon (nodata outside)... that is of course if you have Spatial Analyst extension, if you don't you're stuck with Clip. GoMapping, there is no tool that does this 'out of the box', your only option is to use a model or python script (I wrote one a few years ago because there was no tool to do this). – Michael Stimson Jul 20 '15 at 22:01
  • The Clip tool has a parameter called clipping geometry, if this is ticked on then it uses the polygon and not it's minimum bounding box. So the model I suggest could take a grid of polygons or clip to the shape of the polygon. Come to think of it @gomapping should ensure the snap raster environment setting is set to ensure everything lines up. – Hornbydd Jul 20 '15 at 23:19
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Split raster does this, even keeps polygon geometry

enter image description here

it chops single raster into bits and uses polygon geometry. Output base name is updated by seq.number, as always it is a 'bad' numbering i.e. image1, image2 etc while it should be image01, image02 etc if number of polygons > 9 and < 100. Would be helpful with sorting by name. Apart from this - great tool

These 3 are different rasters chopped from a big one:

enter image description here

  • hmmm....i don't get the POLYGON_FEATURES option from the split method drop down. I have arcinfo. Do you know if it is linked to an extension? – gomapping Jul 20 '15 at 20:40
  • NA before ArcGIS 10.2 – FelixIP Jul 20 '15 at 21:12
  • Split raster 10.2 resources.arcgis.com/en/help/main/10.2/index.html#//… prior to this version only SIZE_OF_TILE and NUMBER_OF_TILES options are supported. Not sure how that works whether it's by unique attribute or by polygon, I guess try it and see. Felix can you extend your answer a little about this new functionality. – Michael Stimson Jul 20 '15 at 22:07

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