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I have created a raster of New Mexico with a contour line signifying a certain elevation.

What I'm trying to do is have QGIS finish the line around the edges of the state (where applicable) so it creates a polygon. If this is not possible, is this something I can do in GDAL or something?

I'm trying to create overlays for Google maps, so I need to get the coordinates all the way around so that I can make a polygon if that makes any sense.

New Mexico

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  • Hi, mybe I haven't understand the question, but do you try the processing tool "Lines to Polygon" in QGIS?
    – Oscar Campo
    Commented May 8, 2018 at 9:09
  • I just tried that, and it doesn't seem to generate anything, but that's essentially what I'm going for.
    – m0ngr31
    Commented May 8, 2018 at 15:03

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I ended up going to a different solution, and that could be tweaked to make this work: Create polygon from TIF raster (between 2 elevations)

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