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I am trying to create a 3D bathymetry surface from xyz data.
There is approximately 300,000 points with lat, long and z (depth data). The data is sonar point data similar to LiDAR data.
I want to use GRASS and I'm looking around for the right functions.
I can import the data to grass with
v.in.ascii -z and I tried using
v.extrude which killed my computer (must be the number of points).
I might be able to create contours in QGIS and use
r.surf.contour but I think I'll lose resolution if it works at all.
I'm not familiar with GRASS and I guess that, this is probably a relatively easy thing to do but I've hit a wall with it. I would imagine someone has encountered this before.