I am trying to build a layer of distance to relevant landscape elements in a watershed. To be relevant, a landscape element must be downstream with respect to the runoff direction.
Clearly, I want to assign to each point belonging to a regularly spaced points layer, the distance to the nearest landscape element, which is in the direction of the slope.
To do so, I have :
- A polygon shapefile of « LANDSCAPE ELEMENTS » which are polygons of hedgerows, and forests (that are not distinguished).
- A Digital Elevation Model
- A shapefile of a regular point grid (50 m x 50 m, a total of 500 000 points )
Note : I'm using ArcGIS 10.1 with Spatial Analyst