Best Scanner For Caves?

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Oxbow
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Re: Best Scanner For Caves?

Post by Oxbow »

Hello,

we have a good video from german first TV station about the use of Geoslam Scanner for cave scanning.

The user is one of the famous german researcher for underwater archology and research diver.
They research group dive with scanner in transport carry box into a underground gave. The versatility of the geoslam scanner is amazing.

https://www.laserscanning-europe.com/en ... umentation

the documentation is here and start by minute 30 arround. I am not sure, if it is work outside from germany.

https://www.zdf.de/dokumentation/terra- ... r-100.html


...Eric
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Re: Best Scanner For Caves?

Post by smacl »

I see another post on the site is promoting the GeoSlam coupled with an Elios drone, see here. Could be a potential option where there is restricted access.
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Re: Best Scanner For Caves?

Post by smacl »

sim.herrod wrote: Tue May 24, 2022 9:19 am Have a look at the Emesent Hovermap.

We were very impressed with the quality and accuracy of the data.
Looking at some promotion of this over on LinkedIn, pictures look nice but very difficult to get a feel for the quality without actually analysing the data in detail from a client job. Have you used it yourself yet Sim?
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Re: Best Scanner For Caves?

Post by Jamesrye »

We used one of the small Faro scanners on a real project, cloud alignment works well as there is variation in the cave passages and the scanners are light. Shot in targets with a total station also.
30721761527_96f9808d73_o.png
When the Zeb Revo was still fairly new, we did experiments in Exeter's underground passages. We did all sorts of testing, using there and back loops vs single runs etc...Sometimes you get decent results, but we found that often, there was 'slippage' or just badly registered data. It was much more reliable on building surveys. But this environment was really tough, with very narrow passages and parts were smooth tunnel.

https://www.youtube.com/watch?v=Yg13fLP84T8&t=45s


youtu.be/Yg13fLP84T8
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Re: Best Scanner For Caves?

Post by Justin Richards »

sim.herrod wrote: Tue May 24, 2022 9:19 am Have a look at the Emesent Hovermap.

We were very impressed with the quality and accuracy of the data.
I seen that on the last webinar, I did like the versatility of it.

Do you think it could produce repeatable results in a tight space?
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Re: Best Scanner For Caves?

Post by Justin Richards »

smacl wrote: Tue May 24, 2022 3:43 pm I see another post on the site is promoting the GeoSlam coupled with an Elios drone, see here. Could be a potential option where there is restricted access.

Wow, that's some impressive capabilities.
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Re: Best Scanner For Caves?

Post by Stefan H. »

As I remember, the GeoSLAM scanners were originally invented for that purpose, to scan a cave in Australia. You can find nice videos of that early versions when searching "zebedee csiro" in youtube. For example this one:
https://www.youtube.com/watch?v=jt38pF_TJvY

The results already looked impressive in 2014. And it improved.
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Re: Best Scanner For Caves?

Post by max72 »

Justin Richards wrote: Mon May 23, 2022 3:31 pm I need to scan a cave with floor to ceiling heights ranging from one to four feet (30-120cm). There is water on the bottom of some of it so its just going to be the ceiling in places. The purpose of the scan is to compare before and after a nearby road construction project.

I was looking at the BLK2GO and the CaveTron. Does anyone have any other recommendations?



https://shop.leica-geosystems.com/leica-blk/blk2go

https://caveatron.com/
You say the purpose is to compare the scans, so you reasonably have to measure a deformation. I think the key point is the minimum difference you have to measure.
Do you need an array of control points of aligning the scan sets is enough? Depending on the minimum deviation you are supposed to measure everything changes, both controls and hardware.
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Re: Best Scanner For Caves?

Post by Justin Richards »

max72 wrote: Wed May 25, 2022 8:43 pm

You say the purpose is to compare the scans, so you reasonably have to measure a deformation. I think the key point is the minimum difference you have to measure.
Do you need an array of control points of aligning the scan sets is enough? Depending on the minimum deviation you are supposed to measure everything changes, both controls and hardware.
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Right now we don't have predetermined allowance.
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Re: Best Scanner For Caves?

Post by 6R07K »

Hi,

Scanned lots of caves with Geoslam Zeb, it's good but expect to have failures from time to time. We have noticed a habit of it stretching narrow areas.
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