In ArcGIS 10.1 (advanced license), I have a slope raster of a given area and a polyline.

I want to set the slope values along the polyline to 0.

I'm thinking of this process - extract the cells along the polyline using the Extract by Mask tool, then reclassifying those cells giving a 0 value, and then using a conditional statement in Raster Calculator to substitute (in the general area's slope raster) the polyline cells with those cells which now have 0s.

I am not sure this is a good solution and I cannot figure out what the conditional statement should look like.

1 Answer 1


Use the polyline to raster tool and set the slope raster as the extent and snap raster in the tool environment settings. Use a Con statement in the raster calculator tool:

Con(IsNull("yourlineraster"), "yoursloperaster", 0)

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