Topo profile method

Matrice_400
Matrice_400
in 2D Drafting

Hello,

I am stuck on creating a longitudinal profile for a cable car path in BricsCAD.

I have imported my TIN surface, my LAS point cloud, and my TIFF orthophoto. How can I cleanly extract the vertical cross-section of the terrain along this specific alignment?

Thank you for your feedback and advice.

Best regards,

Comments

  • Virgil
    Virgil

    Hello.

    You could experiment with using a certain reference system and position all data sources relatively to one another.

    Then, a horizontal alignment can be created starting from the orthophoto.

    The next step would be to create a 3D alignment based on the horizontal alignment and the TIN surface.

    Finally, creating a vertical alignment view will display the vertical alignment.

  • Matrice_400
    Matrice_400

    "You could experiment with using a certain reference system and position all data sources relatively to one another." That is already the case.
    I have drawn the track ropes and haul ropes as geospatial polylines based on the point cloud, but when I run the longitudinal profile command, only the TIN model is taken into account. I need the cable car components (station, cables, pylon) to appear.

  • ALANH
    ALANH
    edited July 14

    If you want say the building to appear in your long section then you need to edit the TIN and add relevant say top 4 corners of the building, you will also need say a BASE line running around the building, You would do this via a BREAKLINE, then erase all 3dfaces inside building and add the corner points and remake the TIN. It is doable but takes a few steps not a "look its done". One important thing is that the building top is like 1mm inside the base so you get vertical Tin faces.

    I did a huge redevelopment in China the TIN had 15 edits, some simple some very complicated. Would do an edit and save as a new TIN that way when some thing was wrong did not save the TIN.

    For the towers need again a simple 3d shape of points.

    Is your Tiff a 3d Tiff or just an image ?

    Googling TINEDIT has option add Breaklines. You may need to use merge TIN's to get the effect thinking some more, yes spent like 40 years playing with TINS.

    Will have a think about it.