# 3D Interpolation and Cross Sectioning

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08-10-2016 05:49 AM
New Contributor III

I'm new to 3D representations but I think what I want to do ought to be possible.  Here it is:

I'm trying to identify the best (any) method to create an extrapolated (interpolated) 3D 'thing'.  Not sure if it would rightly be called a surface, multipatch, or extruded shape but here's the detail.

I've got boring data for some number of wells across a site.  For each well I have the horizontal location and the starting elevation (ground surface).  The well data records a value for the amount of a soil contaminant at various irregular intervals along the depth of the well shaft.  I have the depth of each recording and can calculate the elevation of each recording.  So the tabular data after formatting will look something like the table at the bottom. It should be noted that each well is of varying depth, and the responses are irregular in their depth intervals.

Using a Z-enabled FC I can create a matrix of points each with a response value that I then want to use to construct the 'blob' to visualize the extent and distribution of the contaminant based on the response.  I want also to be able to afterward take cross sections (horizontal and vertical) of the resultant 'blob'.

Does ArcGIS have tools to perform these functions?  I've access to Map 10.4, Pro 1.3, 3D analyst and Spatial Analyst extensions.

Any insight the community can provide is appreciated.  Thanks for reading!

WellXYZ(Ft AMSL)Response(ppm)
A11111111.111111111.22300
A

11111111.1

11111111.222225
A11111111.1

11111111.2

21940
B22222222.122222222.2195100
B22222222.122222222.219160
B22222222.122222222.218850
C33333333.133333333.232225
C33333333.133333333.23205
C33333333.133333333.23120
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2 Replies
New Contributor III

Dan,

Here's a video made a while back showing a similar analysis being done:

For the cross-section views, our fearless narrator, Gert Van Maren​,​ is using Intersect 3D (Intersect 3D—Help | ArcGIS for Desktop ) to create slices of the subsurface multipatch volumes he has created.

To create your plumes (blobs), I would select your 3D depth-enabled sample points by Response (ppm) and create a 3D convex hull (Minimum Bounding Volume—Help | ArcGIS for Desktop​) around each contamination level you're interested in. Then you can go about cross-sectioning to your heart's content.

Best of luck!

New Contributor

Dan,

Is there an updated link to the Subsurface Visualization Video?