AnsweredAssumed Answered

Calculating Correct Slope Values from DEM

Question asked by Julie_nacos on Aug 13, 2016
Latest reply on Aug 13, 2016 by Dan_Patterson

I projected ASTERDEM (16 bit signed integer with a 1 arc-second resolution) downloaded from USGS EarthExplorer to WGS1984_UTM34N using the project raster tool, and used bilinear interpolation within ArcMap 10.3.1. (After projection, the DEM's linear/horizontal units are in meters  (The DEM were downloaded in TIFF format) Then I calculated slope percent using the Spatial Analyst > Surface > Slope tool using percent rise as my output measurement tool. The z factor remained at the default of '1.'  I attached a screenshot of the slope results as both the percent values and the visual appear incorrect. Has anyone else had this issue? If so, would you have any suggestions? 

(I attached a screenshot of the metadata from the original ASTERDEM download as well)

Attachments

Outcomes