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These contours were generated as a cartographic product for use in map production and spatial analyses. While they conform well with the base data from which they were generated, no effort was made to guarantee a specific level of contour accuracy. |
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These contours were generated as a cartographic product for use in map production and spatial analyses. While they conform well with the base data from which they were generated, no effort was made to guarantee a specific level of contour accuracy. |
| accessInformation:
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Clean Water Services |
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5000 |
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[] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>These contours were extracted from 2 foot contours. The 2 foot contours were generated primarily from a 2014 LiDAR-based DEM dataset acquired by Oregon Metro. Historical LiDAR-based DEM data were used to augment the 2014 DEM as necessary to provide complete coverage for the Tualatin Watershed. The general contour generation process was: 1) Apply evenly weighted 5x5 smoothing to DEM via convolution function 2) Generate contours from smoothed DEM using gdal_contour utility 3) Split contours into 1000 ft segments 4) Remove contours with circumference less than 100 ft 5) Build geometry and attribute indices.</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>These contours were not assessed for absolute accuracy. The results of any design, planning, analysis or other work conducted using these data should be treated as approximate.</SPAN></P></DIV></DIV></DIV> |
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| title:
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Contours - 10ft |
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| tags:
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["topography","elevation","cws","topo","contours","clean water services"] |
| culture:
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en-US |
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| minScale:
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150000000 |
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