1m Contours (2002)

1m Contours (2002)

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Click Here for metadata. These contours are not of survey quality, and contain all of the accuracies and inaccuracies identified in its source product, the TIN surface. Products derived from the TIN (i.e., contours) should be done with caution. Man-made features that span valley systems will create artificial contours along the sides of bridges, creating in effect, an embankment where none exists. Similarly, where breaklines that identify the top/toe of slopes are absent, the 10m spacing between spot height elevations may not provide sufficient density to accurately calculate slopes in smaller valley systems. As one would expect, contours created using spot height elevations alone tend to result in the generation of undulating surfaces that may underestimate sharp changes in slope or fail to capture small-scale features.
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open data (2019). 1m Contours (2002), Data Item, OpenGMS, https://geomodeling.njnu.edu.cn/dataItem/5cd5a8804e0fedf67d8c2fbf
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Initial contribute : 2019-05-10

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