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Point cloud elevation/area calculation
Posted: Wed Mar 10, 2021 2:56 pm
by ara5801
Hello,
I have created an elevation map on a point cloud using the SF function. From here is there a way to calculate the area of 'land' that is at each z elevation level?
Re: Point cloud elevation/area calculation
Posted: Wed Mar 10, 2021 8:57 pm
by daniel
Not in an easy way.
I see two options, both with the "Rasterize" tool:
- simple: generate a raster with the scalar field as the 'active layer'. Then export the grid as a new cloud. You can then use the 'Edit > Scalar field > Filter by value' tool to extract the points (= grid cells) that correspond to some specific values. Then if you read the number of points in the extracted clouds, you can derive the surface (considering each point is equal to a square with the square grid step as surface
- harder: generate the contour lines based on the scalar field (once again as the 'active layer'). Then export the contour lines and use an external tool that would be able to compute the corresponding surface