tree SLAMing

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Superbob3D
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tree SLAMing

Post by Superbob3D »

Hello all,

I could use some advice/feedback about creating a pipeline for scanning individual trees. I've used TLSs in the past, which gave great quality data, but admittedly overkill accuracy. I need to find quicker way to gather the data. I'm assuming some sort of SLAM unit would work well, but I know very little about either the units or the software/protocols for processing the data.

Note: I have Recap at my disposal, and am a longtime user of Cloudcompare for cleanup and geolocation (though not for registration).

Anyone have a thought on what a good (budget friendly) unit would be for scanning trees? And a rec for the registration software/protocol?

Thanks all and "Happy Scanning!"

Bob
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Re: tree SLAMing

Post by smacl »

Hi Bob,

We put together a workflow in SCC last year for efficient manual tree extraction from point clouds, see video below. I haven't used Recap or CloudCompare, but guessing you could do similar with CloudCompare given its large array of tools. Worth pointing out that all forests are not equal. Those with well spaced trees with near vertical trunks on relatively flat ground without too much undergrowth are easy. Once you go into hilly terrain, dense undergrowth and tree trunks that branch often, sometimes close to the ground, things get way more complex. Our approach is designed for the latter, for the former, fully automated approaches are worth looking at. I understand RiProcess does this well.


youtu.be/GxvWfLECZ18
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Re: tree SLAMing

Post by VXGrid »

Superbob3D wrote: Mon Jan 29, 2024 4:37 pm Hello all,

I could use some advice/feedback about creating a pipeline for scanning individual trees. I've used TLSs in the past, which gave great quality data, but admittedly overkill accuracy. I need to find quicker way to gather the data. I'm assuming some sort of SLAM unit would work well, but I know very little about either the units or the software/protocols for processing the data.

Note: I have Recap at my disposal, and am a longtime user of Cloudcompare for cleanup and geolocation (though not for registration).

Anyone have a thought on what a good (budget friendly) unit would be for scanning trees? And a rec for the registration software/protocol?

Thanks all and "Happy Scanning!"

Bob
Hey Bob,

I think most SLAM scanners should work in that regard, the question is where the positioning is coming from.
If there are only a couple of trees, the SLAM might have issues and the result would be more precise when combining it with a GPS antenna.
In the woods you won't have proper GPS, but the SLAM should be fine.

So an Emesent, FARO Orbis, or Stonex should work well. NavVis would be possible as well, if the full body armor is not hindering you.
Perhaps you have the chance to ask a sales Rep from the newer cheaper chinese scanners for a demo/trial in your environment.

No need to worry about registration software, the SLAM scanners come with their own software to get finished registered point cloud. Isn't possible in a different way, since the data formats of the instruments are not known.
And then you could continue with SCC or CC as Shane pointed out.

Martin
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Re: tree SLAMing

Post by Superbob3D »

Shane, cool protocol. I think our geospatial team, that does all of our large scale forestry scanning, has some similar tools. I'm not real familiar with them, but I'll run this past them to see what they think.

Martin, thank you for the suggestions. How I geolocate this data will likely depend on several variables. I expect that most of my data is going to gathered in urban areas, where I should be able to eyeball the cloud to match objects located on the property survey. I have access to a whole survey department, so if I need monumentation set (so I can set up some globes) I can add that into the budget.

I'm happy to hear that registration is taken care of. I figured as much, but it's great to know it's baked into the process. I know the data won't look anything like this:

https://vimeo.com/907977140

but it should be good accurate enough for the use cases that I'll be delivering to.

I'll check out those units.

Thank you both!

Bob
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Re: tree SLAMing

Post by Attila »

Hi!

I have a Paracosm Px-80 slam scanner for sale. In the video it is used for exactly what you want it to do.
https://www.youtube.com/watch?v=F5qHgw1aiXA&t=11s
I have surveyed wooded areas with it, there were problems, but I made much better progress than if I had done it with a total station or static scanner. The main problem was when I stumbled in the brush and suddenly the Px-80 moved a lot. I used the Trimble Business Center for processing, it strips the trees and determines a lot of the data.

https://www.youtube.com/watch?v=F5qHgw1aiXA&t=11s
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Re: tree SLAMing

Post by MarkJLane »

This was a 5-minute job with the GeoSLAM ZEB Horizon.



Last edited by MarkJLane on Thu Feb 01, 2024 10:12 am, edited 1 time in total.
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Re: tree SLAMing

Post by VXGrid »

MarkJLane wrote: Thu Feb 01, 2024 8:22 am This was a 5-minute job with the GeoSLAM ZEB Horizon.
The data is not loading in firefox...
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Re: tree SLAMing

Post by MarkJLane »

VXGrid wrote: Thu Feb 01, 2024 9:19 am The data is not loading in firefox...
Thanks mate. I just added a video also.
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Re: tree SLAMing

Post by smacl »

MarkJLane wrote: Thu Feb 01, 2024 10:13 am
VXGrid wrote: Thu Feb 01, 2024 9:19 am The data is not loading in firefox...
Thanks mate. I just added a video also.
Lovely looking data Mark. What did you use to classify the foliage separately from the trunk.
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Re: tree SLAMing

Post by MarkJLane »

smacl wrote: Fri Feb 02, 2024 9:16 am Lovely looking data Mark. What did you use to classify the foliage separately from the trunk.
I used the label connected component tool under tools>segmentation in cloud compare :like:
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