Select surface as like 3D, make the mesh from selected surface and export to json in ArcGIS Pro

[VolodymyrDmytruk1]

Help me solve the following problem! 
I need to get a mesh of 3D surface. But I am a beginner to use ArcGIS Pro, and therefore do not understand what steps I need to do in order to convert the surface in the mesh, and then export the mesh in json. 
I would appreciate any - help.

[DanPatterson_Retired]

can you do this in ArcMap?  I wouldn't start in Pro if you are just getting started since full functionality is not there

[VolodymyrDmytruk1]

Unfortunately I need to do it in ArcGIS Pro. And, unfortunately with ArcMap, I also never worked. You can give a hint how it can be done in ArcMap?

[DanPatterson_Retired]

sorry I thought you were trying to replicate a workflow. I havent seen any tools for producing a 3D mesh in Arc*.  You would have some success using the matplotlib and numpy or scipy, but that would just produce the graphical representation and not a spatially referenced data structure.  I didn't see anything on ArcGIS Code Sharing but you might have a look around (mesh and wireframe keywords returned nothing however)

[VolodymyrDmytruk1]

Thanks for the help.