Featured TUTORIAL LIDAR (Point cloud) to mesh tutorial

Discussion in 'Tracks' started by DanTDBV, Jan 8, 2016.

  1. LilSKi

    LilSKi Well-Known Member

    Joined:
    Apr 6, 2015
    Messages:
    370
    Likes Received:
    329
    If you are going to end up in blender just better to start there.
     
    Vakulinchuk likes this.
  2. Vakulinchuk

    Vakulinchuk New Member

    Joined:
    May 29, 2020
    Messages:
    10
    Likes Received:
    5
    Last edited: Jun 15, 2020
    EKO Sim-Racing likes this.
  3. Vakulinchuk

    Vakulinchuk New Member

    Joined:
    May 29, 2020
    Messages:
    10
    Likes Received:
    5
    EKO Sim-Racing likes this.
  4. LilSKi

    LilSKi Well-Known Member

    Joined:
    Apr 6, 2015
    Messages:
    370
    Likes Received:
    329
    Pretty sure I covered centering the model in the first video of the tutorial series.
     
  5. Vakulinchuk

    Vakulinchuk New Member

    Joined:
    May 29, 2020
    Messages:
    10
    Likes Received:
    5
    That's ok for an oval, but what about if its a 15 km long route?
     
  6. LilSKi

    LilSKi Well-Known Member

    Joined:
    Apr 6, 2015
    Messages:
    370
    Likes Received:
    329
    Should be able to assign the same center point value to all the tiles you add in. Just write the one down from the center most tile and use that number for all the tiles after that.
     
    Vakulinchuk likes this.
  7. AkinOstrich

    AkinOstrich New Member

    Joined:
    Dec 19, 2020
    Messages:
    21
    Likes Received:
    1
    Location:
    Bloomington, IL
    Hello everybody! I'm remaking my neighborhood in Blender. I used some LIDAR data, trimmed lots of vertices, and exported the .fbx file from Blender. However, when I tried to open the .fbx file in AC Editor, it had trouble importing (meaning no progress loading at all). Has anybody else had this problem?

    Just trying to drive with basic Blender textures. Using checkered for terrain and brick for all boxes. I have respected all naming conventions, but still not sure what's going on. Any tips?

    EDIT: The max amount of vertices for one mesh supported by AC Editor is 65536. I had 241,721.
     
    Last edited: Dec 19, 2020
  8. maruto

    maruto Active Member

    Joined:
    Apr 28, 2020
    Messages:
    126
    Likes Received:
    218

    Hello @AkinOstrich ,

    yeah you have to make sure you split large meshes like terrain and road to smaller section so it never goes higher than 65k vertices....

    welcome here and share your work if you feel like it, I'm sure many of us will enjoy discovering your neigbourhood! (and help you bringing it to AC)
     
    AkinOstrich likes this.
  9. AkinOstrich

    AkinOstrich New Member

    Joined:
    Dec 19, 2020
    Messages:
    21
    Likes Received:
    1
    Location:
    Bloomington, IL
    Hi guys! I've found out that some users might need to select "Number of Returns" in the Scalar Fields Active drop-down box. It wasn't working too well for me when I used "Classification". This may be because of the source of the LIDAR data? Anyway, the sliders in the SF display params worked well separating the ground from the trees after that.

    From there, as @DanTDBV said, use "Filter Points By Value", uncheck the sample which you want gone, and convert to mesh (Delaunay 2.5D (XY Plane)). Thanks guys!

    upload_2020-12-19_16-21-32.png
    Filter Points By Value tool

    upload_2020-12-19_16-9-20.png
    Number of Returns (right slider under 2)

    upload_2020-12-19_16-10-44.png
    Classification (right slider under 2)
     
  10. Mr Whippy

    Mr Whippy Active Member

    Joined:
    Jan 18, 2016
    Messages:
    199
    Likes Received:
    142
    I found this earlier, while looking for where I'd originally downloaded the environment agency LAZ files.

    https://houseprices.io/lab/lidar/map

    It's a great way to just find the coverage of the open LAZ scans, zoom in, look around, and then generate a mesh from it to ASC format, and save it.
    However, I know these scans are best as point clouds, the mesh generator 'drapes' a cloth over the scene, so data stuff like roads under trees is completely lost.

    Also I'm not sure if it's using the densest point cloud data, or just a lower quality version.

    I'm unsure if it's up to date with latest etc, but it seems quite accurate to what I had found in 2017 ish)


    In any case, a quick handy tool to figure out what data you might want, grab it, and then get the better data if needed later!
     
  11. maruto

    maruto Active Member

    Joined:
    Apr 28, 2020
    Messages:
    126
    Likes Received:
    218
    Here's another LIDAR site from Luxembourg:

    https://lidar.geoportail.lu/

    they scanned the whole country and made all the data available in a interactive viewer with a really good interface. Quite impressive.



    upload_2022-2-4_14-19-17.png

    upload_2022-2-4_14-20-17.png

    upload_2022-2-4_14-23-47.png
     
  12. Mr Whippy

    Mr Whippy Active Member

    Joined:
    Jan 18, 2016
    Messages:
    199
    Likes Received:
    142
    Wow, that's amazing, colour too!

    Possibly posted earlier, same resource as I was using in 2017 earlier in this thread.

    https://environment.data.gov.uk/DefraDataDownload/?Mode=survey



    But seemingly they did a national LIDAR survey in 2019 and from what I can see coverage is either the same or better than the previous surveys where I've looked.

    Definitely worth checking over project areas you're interested in, grabbing all the relevant LIDAR sets, and merging them all in Cloud Compare to see what you've got, if you were disappointed before.



    I'm going to see how viable it is to use the raster ortho photos to colourise the point clouds via Cloud Compare.


    Cheers
     
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice