I have attempted doing a slope analysis of a DEM and isolated areas of interest, however I only want areas where the elevation changes a set distance within at least 30 horizontal feet. The slope tool gives me down to individual 1x1 meter areas representing that slope (e.g. 16.67%; 5 ft rise over 30 ft run). Is there a way to identify areas where such an elevation changes over a set distance horizontally?
Would using the "Reclassify" tool with ranges such as 0-16.67% => 1, 16.671-MAX% => 0 (or nodata) do what you want? This would select or group (however you want to think about it) all the areas with slope <= 16.67% into the "1" category and all other areas into "0" or nodata.
Thank you for the reply. I have essentially gotten to that point, my main trouble is only selecting areas where that elevation change only occurs over at least 30 feet of horizontal distance. After converting polygon, I attempted to calculate an average width of each area using Area and Perimeter and then removing those that fall below that threshold. Was thinking a cleaner way might exist.
