topic Re: How can you perform an observer point analysis using the WorldElevation3D/Terrain3D elevation surface? in ArcGIS Pro Questions

How can you perform an observer point analysis using the WorldElevation3D/Terrain3D elevation surface?

JaimeGonzalez1 — Fri, 08 Jan 2021 18:02:44 GMT

Hi all

I'm trying to perform an observer point analysis, like in this video, minute 14:39: https://www.youtube.com/watch?v=BRqnRcZ-ajQ

I think the guy in the video is able to perform the observer point analysis because he is only analysing a small patch of the world, whereas if I try doing it with the WorldElevation3D/Terrain3D elevation surface, the analysis will take days since it is technically doing it for the entire earth. (If you look at the screenshot I attached to the post, you can see the analysis remains stationary at 0%).

How can I solve this problem? / How can I tell ArcgisPro to only analyse a specific section of the map (the province of Asturias in Spain)?

I'm new to ArcgisPro, so please keep your answer as simple and step-by-step as possible if you can

Thanks for your time

Jaime

Re: How can you perform an observer point analysis using the WorldElevation3D/Terrain3D elevation surface?

Andrew--Johnson — Fri, 08 Jan 2021 19:19:58 GMT

Hi,

If you're using the World Terrain you will want to specify an extent in the tools environments to avoid processing the entire globe.

https://pro.arcgis.com/en/pro-app/latest/tool-reference/appendices/geoprocessing-considerations-for-elevation-surface-input.htm

thanks,

Andrew

Re: How can you perform an observer point analysis using the WorldElevation3D/Terrain3D elevation surface?

Robert_LeClair — Fri, 08 Jan 2021 22:16:08 GMT

What I would do is add specific fields in the point feature class to limit the visibility analysis in the Observer Points tool. To do this I would some or all the fields for limiting the analysis listed in the link above but the most important ones are RADIUS1 and RADIUS2. The defaults are 1 for RADIUS1 and Infinity for RADIUS2. If you set RADIUS2 to be your maximum distance then the processing will be quick. For example, if your data is in UTM, your units of measure are meters. So if you wanted no more than 10 kilometers for your max distance, RADIUS2 would be 10000. Hope this helps!