I am having trouble producing a planform curvature output. I'm unsure what units to use and the spatial analysis documentation seems sketchy. The values should be >-0.1 (convex), -0.1 to -0.4 (planar), and >-o.4 (concave). My values are much larger as shown in an attachment.

The intent is to employ the technique used in "Modeling Steep Terrain Harvesting Risks Using GIS" also attached.

Any guesses?

Stan Hopkins

The intent is to employ the technique used in "Modeling Steep Terrain Harvesting Risks Using GIS" also attached.

Any guesses?

Stan Hopkins

Or are the coordinates in decimal degrees? I would suspect that you must be working with projected data and x,y and z must all be the same units