10 foot contours of the Portland, OR metro area

Jan 24, 2011 (Last modified May 15, 2011)
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Description:
Elevation lines from United States Geological Survey (USGS) 7.5 minute quadrangle maps. Contour interval is 10, 20 or 40 feet, depending on quad. As additional quads become available from USGS, the map extent will be expanded.
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United States Geological Survey (USGS)
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Creative Commons LicenseThis work is licensed under a Creative Commons Attribution 3.0 License.
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Tags:
hypsography, contour, contour line, elevation, topography
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