Convert Polysurface into a Single Surface

Hello everyone. I need help for converting a polysurface into a surface to have a uniform mesh. I would be thankful if anyone can help me with this problem. I want to create surface topography for ground.

Is the 2D projection of the boundary rectangular?

Please upload a Rhino file with the relevant geometry so we don’t have to play the guess game…

QuadRemesh is the tool you need.
You convert the polysurface into a nice quad SubD then into Nurbs and you’re done.
The best would be to just keep the SubD so the result will be lighter.

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Topography.3dm (1.3 MB)
Here you are my friend. I used “Sketch” Layer and Loft curves to create this Polysurface as you see.

actually I just want Rhino mesh to have a basic mesh for remeshing geometry with another tool I just have added to Rhino which named Griddle. (it is a plug-in that you meshing your geometries to import into a Finite Difference software called FLAC 3D)

:pirate_flag:

I looked at your file again and noticed you’re using a pirated license. I do not support that.

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The file you have uploaded is Rhino8 save file. My version is 7

yes unfortunately I’m living in Iran and I can’t buy the license.