timothy.mckinney wrote: ↑Tue Aug 17, 2021 7:15 pm
Looking for opinions on the best backpack or handheld scanner and would love some input! List of considerations are:
- Scanner takes high quality imagery. If the scanner cannot natively take high quality imagery then it can support the use of external 360 cameras (potentially the iStar Pulsar or similar)
- Data will be used for collaboration and BIM on ongoing construction projects. We are the surveyors on the project and need to have the data referenced to the project coordinate system. Would default to a more accurate solution if possible.
- Ease of use and software that goes with/is used for registration etc. is solid and easy to use.
- Team is familiar with many lidar softwares including Leica Cyclone, ReCAp, Trimble.
Here are some products I have researched:
- Leica BLK2GO (imagery seems sub par for what we are looking for)
- Leica Pegasus: Backpack
- Leica ProScan
- LiBackPack DGC50 or C50 (not very familiar with this)
- Geoslam Products
Thanks!
well, just how long until the VLX group chirps in. LOL...
As for external camera support. Technically you have that potential with anyone. You just need become a little familiar with Agisoft, or 3DF Zephyr. creative solutions to every need.
As a really cheap alternative to get imagery, you can even just do the Ricoh Theta Z1 with Kuula Tour. So many ways of doing Imagery. But Agisoft is well worth a look. And AgisSoft does support Structured PointCloud data now. Or go big guns and get 3DF Zephyr.
I am partial to the BLK2GO. Size is amaizing. Ease of use. Works inside of Register360. Can mix and match the BLK2GO data with other terrestrial data inside of Register360.
key to BLK2GO we have found. Keep it to Closed loop walks, both starting and ending the walk with a 15 second spin in Puck. Keep those walks to approximately no more than 3 Minutes.
-Scanner is in Puck
-Start Walk
-Leave Spin in puck for approximately 15 seconds
-Leaving Puck in place, pick up the scanner and do your walk
-return to the puck within approximately 3 minutes
-place scanner back in puck (being the same location as the walk originated from)
-leave scanner spinning for 15 seconds
-finish walk
-move buck upline
-place puck within the previous area scanned ensuring substantial overlap to previous walk
-repeat and repeat and repeat till you cover your entire project.
Each of those small closed loop walks can then be registered and corrected separately to control or terrestrial lidar etc..
If you get a few corupted walks, no problem, you still have more than enough data to complete your project
Problem with large walks, is the SLAM drifts more and more as time passes. Also if the walk corrupts, then you lose everything. So better to do more small walks, in so many ways.