I have a raster layer of a stream network with two values (1 no stream, 0 stream). I need to create a 100m buffer around the entire stream network that lies within a specific watershed.shp. I have access to Spatial Analyst. I've tried the expand tool and the polygon to raster tool with zero success.

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    – PolyGeo
    Commented Aug 23, 2016 at 4:03
  • How do you define "zero success"? What precise steps did you perform? What error(s) or other unexpected symptom(s) did you encounter? Have you performed searches using the term "raster to vector conversion"?
    – PolyGeo
    Commented Aug 23, 2016 at 4:06
  • When I use the expand tool, a new layer is generated but it seems to expand into the entire area, meaning it doesn't just "buffer" around the streams, my entire stream.tif becomes one layer.
    – Ash
    Commented Aug 23, 2016 at 4:10
  • Is that not the same as raster to polygon? I guess it isn't. I will search for that. Thank you. I have also tried using the Euclidian distance tool, but I don't have a lot of experience working with raster data, so this is all very new to me.
    – Ash
    Commented Aug 23, 2016 at 4:13
  • Raster to vector is a collective term for "raster to polygon", "raster to line" and "raster to point". I think it will help your question if you can include a picture of what you have and what you are trying to get.
    – PolyGeo
    Commented Aug 23, 2016 at 4:23

1 Answer 1


To do this I would convert Raster to Polyline dataset:

Converts a raster dataset to polyline features

and then Buffer that polyline dataset by a value of 100m:

Creates buffer polygons around input features to a specified distance.

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