I need to calculate various variables for Alluvial Fans in ArcMap such as Fan area, gradient, angle subtended by fan. The data I am using is SRTM 1 Arc-Second Global. I am attempting to map and measure fans for the first time in ArcMap and would like to understand the way in which I can go about doing this.

Also - should I be using the SRTM Non-Void data instead?

  • $\begingroup$ Hi, Welcome to Earth Science SE. This site is different from others. It is not a discussion site. You need to be more specific about your problem. Take a tour of the site. $\endgroup$
    – Padmanabha
    Nov 5, 2021 at 5:22
  • 1
    $\begingroup$ Also, you might get more traction on GIS Stack Exchange. $\endgroup$
    – Spencer
    Nov 6, 2021 at 23:37


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