Polygon Volume: add more height options, not just "polygon of a constant height"

07-17-2020 01:11 AM
Status: Open
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New Contributor III

Since Pix4D is very limited in the size of Orthomosaics that can be hosted on the Pix4D cloud, we'd like to shift everything to ArcGIS Enterprise (with 3D Analyst tools that should work with the Advanced Server type). Thus we want to recreate as much as possible: a) host Orthomosaics regardless of size, b) create a web tool that creates profiles that are downloadable, and c) create a Polygon Volume web tool based on own polygon inputs drawn on the map.


While ArcGIS offers just the possibility to draw polygons of a constant height with its Polygon Volume function, Pix4D offers far more options: triangulated (default...connects the heights from the placed vertices to a polygon with varying heights), average, lowest, highest, custom. We usually never work with a polygon at a constant height since this represents ground plains the least best.


Thus I propose to add more options on how the ground plain is represented with the Polygon volume function in ArcGIS.


For more complex polygons, that are are sloped at a non-horizontal angle, but still planar, I recommend building a TIN from each polygon and using that with the Surface Difference GP tool. That tool supports calculating the volumetric difference between two TIN based (including TIN, LAS, and Terrain datasets) surfaces. So, the trick is to get your polygonal areas of interest represented as TINs. 


Answering to ClaytonCrawford, that works when there is a few number of polygons to be measured. Having to do TINs for hundreds of polygons is not efficient at all, while it would be very quickly if the Polygon Volume tool would have basic base surfaces options.