Shows surface elevation's problems

04-27-2021 10:16 AM
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New Contributor


I've started used arcgis pro, for work, two weeks ago, so  I'm just starting out : 

I've a Las, Dsm, Dem and Tin files of a pavement which presents some imperfections (holes and small bumps)

I would like to create some graphical rappresentation which shows, maybe using tin files, the surface's trend: I was thinking something like  everything in the same z-quote rappresented is one colour and the hole zone shown in an another colour (i've already discovered the elevation symbology but the holes are very small , i would prefer something which shows them better). 

Is this possible? if yes, someone can help me?

Thank you so much


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4 Replies
MVP Frequent Contributor

I'm a bi rusty on my Hydro toolset, but perhaps it can be utilised for this purpose. Sink (Spatial Analyst)—ArcGIS Pro | Documentation and bumps might be derived from the inverse of the DEM.  Shot in the dark though.

MVP Frequent Contributor

Focal Statistics could be helpful in this, though I don't think it will solve this on its own.

For each pixel, Focal Statistics can calculate a statistic for that pixel's neighborhood. Something like Range would be useful in finding the edges of sudden changes in elevation, such as a hole or bump. There's a great document that explains it in more detail :

I'd expect the output could then be symbolized to identify those areas.

Also, take a look at Raster Functions, which you can use to highlight those areas without creating a secondary output.

- Josh Carlson
Kendall County GIS
Esri Frequent Contributor

I wonder if the Cut Fill geoprocessing tool would do the trick between 2 elevation raster datasets?

From the help - "The Cut Fill tool summarizes the areas and volumes of change from a cut-and-fill operation. By taking surfaces of a given location at two different time periods, it identifies regions of surface material removal, surface material addition, and areas where the surface has not changed."

Occasional Contributor III

You could use your DEM file to display a hilllshade as shown on this page: 

The Z Factor parameter may also be useful to overcome the small differences in elevation like it sounds you have.

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