I have a floating point-valued raster which I need to convert to polygon as follows

Put the cells with VALUE < 0.5 into (a small/the smallest number of) polygons

Cells in the range [0.5, 1] into polygons

and so on..

I looked at the Raster to Polygon tool, but there is no place to specify range values. Is there a tool in ArcGIS Desktop/Toolbox for doing this?

  • You can create your polygons from your Raster to Polygon output. Make a selection by attributes then copy the select features to a new feature class.
    – evv_gis
    Oct 21, 2014 at 17:44
  • @evv_gis This is a good approach too but the raster-to-vector conversion is a much more computationally expensive operation than the selection. So if it is a massive raster with numerous complicated polygons you'll be wasting a lot of effort vectorizing them only to subsequently remove them from the vector. Oct 21, 2014 at 17:46
  • I honestly misread the post - I thought the OP said they had used the tool already.
    – evv_gis
    Oct 21, 2014 at 17:47
  • @evv_gis I do that all the time too ;) Oct 21, 2014 at 17:48

1 Answer 1


I would use either the Con or Reclassify tools to create a new raster with the value range that you are interested in and then perform the raster-to-vector conversion on this newly created raster. Two steps and you're done!

  • This is more efficient than the evv_gis approach. Any reason not to use reclass and create a binary raster then polygonize this? Oct 21, 2014 at 18:06
  • @usertwoseventwothreenine In my initial comment (now deleted) I suggested using either Reclass or Con, but given it's just a Boolean raster being created, Con really will fit the bill nicely. Reclass is better suited to more complex operations in my opinion. Of course both will do though. Oct 21, 2014 at 18:19
  • Funny I think the other way. Reclass simple operationss and Con more difficult. Would be good to have a poll. I wonder which one of us in non-traditional or if it would be close to 50/50? Oct 21, 2014 at 18:21
  • @usertwoseventwothreenine That sounds like an interesting question to post! When to use a Conditional Evaluation tool versus a Reclassification tool? You should do it. In light of your view on things, I'll edit my answer to include Con/Reclass. Oct 21, 2014 at 18:27

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