my purpose is to calculate and validate slope in percentage of southern california using DEM and landsat data.
step 1)i used a DEM file and changed with the float type file to integer type step 2) i then change the projection from degree to meter. what does the value signify? step 3) i calculated the slope in percentage and changed the float type into integer type. the value calculated using spatial analyst tool> surface>slope ranges from 0-420!!!. is it possible that the percentage rise in slope is 420% ? step 4) using landsat data i tried to see at what percentage slope the land is getting developed. i find that it is getting developed at more than 50% slope also!! is that logically possible or my calculation of percentage slope is wrong?
is there any way i can calculate the distribution of developed land based on the % slope for the entire study area using arcgis?