<p>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.</p>
<p>Also - should I be using the SRTM Non-Void data instead?</p>

CC BY-SA 4.0
2021-11-05T05:22:28.123Z
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](https://earthscience.stackexchange.com/tour) of the site.
Padmanabha
CC BY-SA 4.0
2021-11-06T23:37:49.433Z
Also, you might get more traction on [GIS Stack Exchange](https://gis.stackexchange.com).
Spencer
<geomorphology>
Mapping and calculating morphometric variables for Alluvial Fans in ArcMap?
Geology98
# Mapping and calculating morphometric variables for Alluvial Fans in ArcMap?

(Asked by: username_0 on 2021-11-04)

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?

**Tags:** geomorphology

> **Comments:**
> **username_1**: 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](https://earthscience.stackexchange.com/tour) of the site.  
> **username_2**: Also, you might get more traction on [GIS Stack Exchange](https://gis.stackexchange.com).  

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## 0 answers

