[GIS] Extracting raster pixel values by polyline

arcgis-desktoparcmaplineraster

I am using ArcMap 10.3.1 to try and extract the values of raster pixels that individual polylines intersect. I have tried using extract by mask but the wide mask created for each polyline intersects a greater number of raster pixels than just the thinner polyline does, which is unfortunately not very useful for me. Are there any ways to achieve the desired result?

Raster layer (white to green pixels, each with a unique value) with blue polylines overlain

Best Answer

One approach: Treat your raster data as elevation, and use StackProfile_3d(in_transect, in_raster, out_tablename, {out_graphname}). You'll get an output table of z-values plotted against distance from transect origin.

Another: Convert your raster to a point file RasterToPoint_conversion(), buffer your transect Buffer_analysis(), and find the overlap with ExtractByMask_sa(). You'll get a new layer that contains only the cells near your transects.

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