Contour lines only generating at top and bottom

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Lachlan B
Posts: 3
Joined: Fri Aug 28, 2020 3:51 am

Contour lines only generating at top and bottom

Post by Lachlan B »

Hi All,

I am new to CloudCompare and found it after looking for an open source way of processing point clouds. I have recently purchased some land and found out I could get Point clouds of my land from the government. I wish to generate contours of the land to assist with designing water storage on the property. The point coulds are over large areas and not crazy dense so I cropped out the section I want with the data (1.7mb) said to have "an accuracy of 0.3m (95% Confidence Interval) vertical and 0.8m (95% Confidence Interval) horizontal "

The Issue I have is that when I generate the plots I get contours only at higher and lower parts and none on the middle (see attached Images). From viewing the dots I can see the contours forming nicely but but when using the rasta contour tool I just cant get them all. Any help or advice would be appreciated.

Regards,
Lachlan
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Cloud Snip.PNG
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daniel
Site Admin
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Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: Contour lines only generating at top and bottom

Post by daniel »

Yes that's a bug with GDAL 3.0 (that we use to generate the contour lines).

See the 2.11.2 preview version that fixes this bug (the official version should be released this week-end):
https://www.cloudcompare.org/release/Cl ... up_x64.exe
Daniel, CloudCompare admin
Lachlan B
Posts: 3
Joined: Fri Aug 28, 2020 3:51 am

Re: Contour lines only generating at top and bottom

Post by Lachlan B »

Thanks for the quick response, good to hear your on top of it. Thank you and all involved for providing such an awesome piece of software for free!
daniel
Site Admin
Posts: 7717
Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: Contour lines only generating at top and bottom

Post by daniel »

By the way, the official 2.11.2 version is now online.
Daniel, CloudCompare admin
Lachlan B
Posts: 3
Joined: Fri Aug 28, 2020 3:51 am

Re: Contour lines only generating at top and bottom

Post by Lachlan B »

Thank you for the update. Worked perfectly, thank you very much. More than happy to donate for such an awesome program and community.
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Verona 2m contours.PNG
Verona 2m contours.PNG (239.67 KiB) Viewed 1052 times
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