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Is there a way to clip a terrain in ArcMap, or make sure it doesn't exceed a certain geographical extent area in the first place?

After creating my terrain from a multipoint file it looks like this:

enter image description here

As you can see, the interpolation goes beyond the extent of the original las files (red boxes).

With a TIN it's possible to limit the extent either before or after you create it; before by adding a surface constraint to the las dataset and after with tools like Edit TIN and Delineate Tin Data Area. However, these options doesn't seem to be available when working with terrains.

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According to ESRI best practise for terrain datasets:

"Do not use clip polygons as a means for extracting/processing subsets of a terrain dataset. All data gets triangulated/pyramided regardless, so using a clip polygon is not appropriate for this task. Instead, extract subsets into separate feature classes and use those to define the terrain dataset."

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You can clip TIN with polygon (if you have 3D analyst licence)

https://support.esri.com/en/technical-article/000006507

Or you can use the procedure explained here:

Clipping TIN in ArcGIS for Desktop?

  • check the question again; it´s not about TIN´s...actually it sounds like OP knows how to do it with a TIN ,) – ThingumaBob Apr 6 '18 at 13:32
  • Thank you. But as ThingumaBob points out this is about terrains and not TINs in the traditional sense. – Linebeck Apr 6 '18 at 13:39
  • My bad, anyway I looked into the help, and it seems like you should be able to add 2D clipping polygon without rebuilding the terrain: desktop.arcgis.com/en/arcmap/10.3/manage-data/terrains/… – Jan Doležal Apr 6 '18 at 13:47

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