Does anyone know where I can find good contour layers for Oregon?

I do not have spatial analyst, so I can not make my own.

  • Have you tried oregongeology.org? – Rodri Dec 15 '16 at 22:09
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    If you are seeking open data, even when it is spatial, then I think the best place to research/ask is the Open Data Stack Exchange. – PolyGeo Dec 15 '16 at 22:17
  • There are open source tools which will accomplish this if you have a DEM. Have you tried QGIS? No license required. – Fezter Dec 15 '16 at 22:45
  • I have been looking around on oregongeology.org and have not found any contours. I have barely looked at QGIS. I could really use some good 20ft interval contours for Oregon. Thank you. – Austin Larson Dec 19 '16 at 21:45

You can make you own with a really straightforward workflow and a couple of free gdal tools

1) download the SRTM data from http://dwtkns.com/srtm/

2) merge multiple tifs into one

gdal_merge.py -a_nodata -32768 -o output.tif tiff1.tiff tiff2.tiff ..

3) make your own contours

gdal_contour -a elevation -i 10 output.tif oregan.shp
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The Oregon Spatial Data Library (search for contour) has 100ft & 500ft contours available as shape files. They are split up into 9 sections to keep the sizes down.

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  • I want like a 40ft or 20ft countour interval. a usgs contour layer that they use would be super cool. yuh know how the usgs has all the maps. and they have contours. if i could get all those contours in a line type shapefile that would be great. lookin all smooth and clean. not all jenky like a derived layer – Austin Larson Dec 31 '19 at 19:09

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