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Calculating slope with NED

Question asked by aggie.14 on Jul 20, 2015
Latest reply on Jul 21, 2015 by GUpchurch-esristaff

I am trying to calculate, then reclassify, a DEM raster to show areas that are 20%slope and greater. I am able to calculate the slope using the slope tool in Spatial Analyst, but I am having trouble interpreting the output raster. The output raster has extremely high values and it doesn't look like the result I could then just reclassify to show 20% and greater. Am I going about this in the right fashion? Does the Z factor have something to do with this?