HOW TO
Contour lines are presented as line features in a shapefile or feature class (vector data) containing elevation values for each line. The image below shows an example of contour lines.
In some instances, these lines must be converted to a slope map for slope analysis. This article provides instructions to create a slope map from contour lines.
To convert the contour lines to a slope map, they must be converted to a digital elevation model (DEM) using the Topo to Raster tool. The DEM data are converted to a slope map using the Slope tool.
Note: The Topo to Raster and Slope tool require a Spatial Analyst or 3D Analyst license.
The image below shows a DEM created from the contour lines.
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