How to "slice" a point cloud building horizontally instead of vertically (path profile tool)

XionicFire
XionicFire
in Vector Data

Hello all,

Its a simple question but one I cannot find a simple answer, I know I can slice a building sideways using the path profile view and its great, but is there a way to do the equivalent on the horizontal plane?

Essentially I am trying to draw a couple of buildings footprints, they are in point cloud format, the buildings have little awnings that don't let me see the actual building size from the top down view, so I must "slice" them at the middle to see the walls cleanly.

There are a couple of ways to manually do this (path profile, select walls, copy paste to new layer, view again etc) but since the buildings are at different levels and some on a steep incline its very time consuming to do this on each one.

Is there any better way to do this?

Any suggestions are welcome.

Best Answers

  • bmg_mike
    bmg_mike Global Mapper Guru Moderator, Trusted User
    Answer ✓

    What you might try is splitting up the layers by the Height Above Ground. For example, select all of the Lidar points with the Digitizer Tool, then right-click and select the Advanced Selection -> Filter Lidar option and then Unselect everything below the min height of the awnings (probably 2-3 meters). Then cut-and-paste what is left to a new layer that you can just turn off when drawing the building outlines.

    image.png

    Thanks,

    Mike

    Global Mapper Guru

  • DerrickW
    DerrickW
    Answer ✓

    You can also clamp the valid elevation range for the point cloud when digitizing.

    image.png
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  • XionicFire
    XionicFire
    Answer ✓

    Thanks for the response Mike

    While it does work, its a lot of work to repeat on every building, as I would need to have a layer for every building level (lots of houses on a slope like on Italy) resulting on hundreds of layers, Derrick's Idea seems like a better fit for this situation, while not ideal, its definitely less work, start with the top house, mark all houses that i can on that level, move to another level and so on, Thanks for the suggestion Derrick

    I hope we can someday get a slicer tool that's mouse adjustable, but until then Derrick's solution is an acceptable workaround, I hope this helps others.

    Thank you all for the responses

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