Hello,
Thank you for your message. But I don't think it helps me.
I want to add a bridge elevation to my DEM. So if I create a 3d vector
line (my bridge) with two vertex at x,y,z coordinates, and is it
possible to convert in a raster where each cells crossed by the line
inherits of his extrapolated altitude ? If no module exists to do that,
what would be the operations necessary to achieve this result ? I hope
it is clearer.
Frank
Le 07/04/2023 à 10:16, Helmut Kudrnovsky a écrit :
Is there a way to rasterize a 3d line to get altitude on raster cells
crossed by the line ?
not quite sure what are you trying to do?
maybe:
v.drape:
Converts 2D vector features to 3D by sampling of elevation raster map.
(https://grass.osgeo.org/grass82/manuals/v.drape.html)
Additional vertices can be added to the input 2D vector map with v.split.
or the something like:
v.fixed.segmentpoints - segment points along a vector line with fixed distances
(https://grass.osgeo.org/grass82/manuals/addons/v.fixed.segmentpoints.html)
followed by
v.what.rast - Uploads raster values at positions of vector points to the table
(https://grass.osgeo.org/grass82/manuals/v.what.rast.html) or v.sample -
Samples a raster map at vector point locations
(https://grass.osgeo.org/grass82/manuals/v.sample.html).
kind regards
helmut
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