hi, I need to know if there are simple commands for this 5 points: 1. the upslope contributing area, As [m2]; 2. the surface curvature,∇^2H [-], defined as the Laplacian of the elevation; 3. the local slope, S [-], estimated as the maximum slope among the eight possible flow directions that connect the cell under exam to the adjacent cells; 4. the distance from the nearest stream, D , defined as the length of the path that hydrologically connects the location under exam to the nearest element of the reference drainage network; 5. the elevation to the nearest stream, H , computed as the difference between the elevation of the cell under exam and the elevation of the final point of the aboveidentified path. I think the number 1 is flow accumulation (spatial analyst - hydrology), the number 3 is slope(spatial analyst - surface), the number 2 maybe the command "curvature" from spatial analyst-surface, and for the last two numbers i think the right tools is distance but really i don't know). Thanks so much for your time. Best regards Luca Guglielmo Bucci
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