Need help to scan a dam with a long distance
-
- I have made <0 posts
- Posts: 9
- Joined: Mon Dec 28, 2015 9:38 am
- 8
- Full Name: NGUYEN Anh Tuan
- Company Details: STI Topographie Informatique
- Company Position Title: Topographe and aerial photogrammetry
- Country: French
- Linkedin Profile: No
Need help to scan a dam with a long distance
Hi everyone,
I would like advices to scan a dam hydraulic that we can't approach to the dam so we have to scan from 600m with a Riegl V400i scanner. This is the fist type project that we have ever scanned so we don't know how to do it. What is the configuration of scan that we have to use (the resolution, the target type...) and how to reattach with coordinated system because we have to use the target in 100m from the scanner and there are a big difference of disance from the scanner to target and form the scanner to the dam? If you have any experience of this type of project, could you give me advices please?
Thanks you very much.
I would like advices to scan a dam hydraulic that we can't approach to the dam so we have to scan from 600m with a Riegl V400i scanner. This is the fist type project that we have ever scanned so we don't know how to do it. What is the configuration of scan that we have to use (the resolution, the target type...) and how to reattach with coordinated system because we have to use the target in 100m from the scanner and there are a big difference of disance from the scanner to target and form the scanner to the dam? If you have any experience of this type of project, could you give me advices please?
Thanks you very much.
-
- V.I.P Member
- Posts: 627
- Joined: Sun Jul 24, 2016 6:19 am
- 7
- Full Name: Ioannis Papas
- Company Details: techical office
- Company Position Title: CEO
- Country: EU
- Skype Name: -
- Linkedin Profile: Yes
- Has thanked: 99 times
- Been thanked: 62 times
Re: Need help to scan a dam with a long distance
I would think about photogrammetry with a PPK drone parallel with a Leica p50.
- landmeterbeuckx
- V.I.P Member
- Posts: 1615
- Joined: Tue May 01, 2012 5:19 pm
- 11
- Full Name: Lieven Beuckx
- Company Details: Studiebureau Beuckx
- Company Position Title: Owner
- Country: Belgium
- Linkedin Profile: Yes
- Has thanked: 183 times
- Been thanked: 548 times
Re: Need help to scan a dam with a long distance
Scan at 100kHZ with panorama 40 or 20. You can scan the targets with the detail tool and finescan then. Or use Prisms.Tony_NGUYEN wrote: ↑Wed Aug 19, 2020 12:40 pm Hi everyone,
I would like advices to scan a dam hydraulic that we can't approach to the dam so we have to scan from 600m with a Riegl V400i scanner. This is the fist type project that we have ever scanned so we don't know how to do it. What is the configuration of scan that we have to use (the resolution, the target type...) and how to reattach with coordinated system because we have to use the target in 100m from the scanner and there are a big difference of disance from the scanner to target and form the scanner to the dam? If you have any experience of this type of project, could you give me advices please?
Thanks you very much.
No need for something else, the vz400i is made for this.
-
- I have made <0 posts
- Posts: 9
- Joined: Mon Dec 28, 2015 9:38 am
- 8
- Full Name: NGUYEN Anh Tuan
- Company Details: STI Topographie Informatique
- Company Position Title: Topographe and aerial photogrammetry
- Country: French
- Linkedin Profile: No
Re: Need help to scan a dam with a long distance
Thanks landmeterbeuckx but do you think that le big diffirence of the distance give a low accuracy for the result?landmeterbeuckx wrote: ↑Wed Aug 19, 2020 1:24 pmScan at 100kHZ with panorama 40 or 20. You can scan the targets with the detail tool and finescan then. Or use Prisms.Tony_NGUYEN wrote: ↑Wed Aug 19, 2020 12:40 pm Hi everyone,
I would like advices to scan a dam hydraulic that we can't approach to the dam so we have to scan from 600m with a Riegl V400i scanner. This is the fist type project that we have ever scanned so we don't know how to do it. What is the configuration of scan that we have to use (the resolution, the target type...) and how to reattach with coordinated system because we have to use the target in 100m from the scanner and there are a big difference of disance from the scanner to target and form the scanner to the dam? If you have any experience of this type of project, could you give me advices please?
Thanks you very much.
No need for something else, the vz400i is made for this.
- landmeterbeuckx
- V.I.P Member
- Posts: 1615
- Joined: Tue May 01, 2012 5:19 pm
- 11
- Full Name: Lieven Beuckx
- Company Details: Studiebureau Beuckx
- Company Position Title: Owner
- Country: Belgium
- Linkedin Profile: Yes
- Has thanked: 183 times
- Been thanked: 548 times
Re: Need help to scan a dam with a long distance
These scanners are designed for these kind of measurements. Accuracy will not ne a problem.
-
- I have made <0 posts
- Posts: 9
- Joined: Mon Dec 28, 2015 9:38 am
- 8
- Full Name: NGUYEN Anh Tuan
- Company Details: STI Topographie Informatique
- Company Position Title: Topographe and aerial photogrammetry
- Country: French
- Linkedin Profile: No
-
- V.I.P Member
- Posts: 140
- Joined: Sun Apr 09, 2017 5:48 pm
- 6
- Full Name: Duy Nguyen
- Company Details: Baezeni VietNam
- Company Position Title: Baezeni VietNam
- Country: Vietnam
- Skype Name: duy_bz
- Linkedin Profile: No
- Has thanked: 8 times
- Been thanked: 8 times
Re: Need help to scan a dam with a long distance
If you need model from pointcloud pm me.
You do not have the required permissions to view the files attached to this post.
-
- I have made 10-20 posts
- Posts: 18
- Joined: Fri Apr 21, 2017 1:28 pm
- 6
- Full Name: Ananda Fowler
- Company Details: GEOHAWK GmbH
- Company Position Title: Owner
- Country: Austria
- Linkedin Profile: Yes
- Has thanked: 1 time
- Been thanked: 7 times
Re: Need help to scan a dam with a long distance
Just want to toss this in here for anyone who wants to perform some monitoring scans:
Effective monitoring range = 1/2 max spec range
This holds true for every instrument I've used, and is a great rule of thumb.
The max range specified by a mfgr is not within the precision spec of said instrument. There is a scalar of error, and it is usually in relation to the beam divergence and optics of the instrument.
The result, is that you want to have a system that is spec'd for at least 2x as far as the monitoring distance.
The optimum scanner for your 600m range would be a VZ-2000i.
The 400i could work, depending on the requirements of the project, and how large your sample sizes are...
If I had to pick one scanner for all things monitoring, it would be the VZ-4000.
The precision of that instrument at range is amazing.
Effective monitoring range = 1/2 max spec range
This holds true for every instrument I've used, and is a great rule of thumb.
The max range specified by a mfgr is not within the precision spec of said instrument. There is a scalar of error, and it is usually in relation to the beam divergence and optics of the instrument.
The result, is that you want to have a system that is spec'd for at least 2x as far as the monitoring distance.
The optimum scanner for your 600m range would be a VZ-2000i.
The 400i could work, depending on the requirements of the project, and how large your sample sizes are...
If I had to pick one scanner for all things monitoring, it would be the VZ-4000.
The precision of that instrument at range is amazing.
- smacl
- Global Moderator
- Posts: 1409
- Joined: Tue Jan 25, 2011 5:12 pm
- 13
- Full Name: Shane MacLaughlin
- Company Details: Atlas Computers Ltd
- Company Position Title: Managing Director
- Country: Ireland
- Linkedin Profile: Yes
- Location: Ireland
- Has thanked: 627 times
- Been thanked: 657 times
- Contact:
Re: Need help to scan a dam with a long distance
Another instrument to consider for monitoring would be the P50 used in conjunction with a control network of known stations for instrument position and orientation established by total station. I've also seen the MS60 used to great effect for monitoring though it is possibly too slow for a structure of this size. Also worth considering for monitoring is whether the position on which your instrument has been setup is a position that can potentially change over time which needs to be accounted for in the measure. Surveying a braced network of control points with a good total station, which includes control external to the structure under investigation, is going to be very useful here regardless of the scanner you end up using.