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The 3D distance of a line along an elevation surface (for example, the length of
a trail) can be added to the line attribute table by using the Add Surface
Information tool. Minimum, maximum and mean elevation and slope can also
be retrieved. The tool can interpolate along a line with only a starting and
ending point; it does not require spaced vertices. Other options exist for
points, multipoints and polygons. Slope values are given in percent
grade(!), not degrees.
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