Hi
Is there any way to generate tunnel DTM from tunnel scanning information?
//Tom
See the following:
https://communities.bentley.com/products/microstation/w/microstation__wiki/16917/how-to-generate-a-surface-mesh-from-a-point-cloud
https://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki/40359/video-how-to-develop-a-fill-stage-terrain-for-a-tunnel-design
https://communities.bentley.com/products/3d_imaging_and_point_cloud_software/f/contextcapture-descartes-pointools-forum/102579/generating-existing-tunnel-from-point-clouds-anyone
The first outlines tools that you can use to create a mesh that can be used in on of our Civil Software.
What would the DTM be used for after its creation?
From tunnel it is impossible to create DTM as there are lower and upper surfaces. But you can create Reality mesh like this example, not a tunnel but example of a cave - http://realitymodels.northeurope.cloudapp.azure.com/rm/Maza_ala2_3mx/App/index.html?scene=Maza_ala_3mx
Only issue that reality models of tunnels are harder to navigate.
Here is an video that shows functions that makes mesh models from scanned tunneldata and also shows what kind of results you get. This was what I hoped to find in Bentley products,
This is Leica Cyclone 3dr.(3dreshaper)
https://youtu.be/F848-W1RAE4?list=PLcGbqWxL0TSdVYjRucLpvBGyT3hzmElu8
Hi Oto
I know, but descartes are the only application for microstation that can read scanned information (las) and create an model, then it is possible to export that model to TRM or realitymodel.
To tringulate scanned tunneldata the result with descartes is totaly wrong. Descartes are triangulating from outside the tunnel, thats why I asked if there is any application from Bentley that can manage to do modeling from inside tunnel and out from scanned data.
Such 3D mesh can be generated in ContextCapture if scanning locations are known.
Maybe it is possible in Descartes but then you need to cut the cloud in upper and lower half and then process seperately.