Any chance to crop a scan by time mark?

[geopollo]

I have had too many cases when the irritating BLK2Go fails to keep track of the scanner orientation during a walk making it completely useless. However I can see parts that would be useful if I were able to remove a part where it gets mad.
The best would be to have select by time mark tool as one can find in MMS. is there any way to access time mark records for the points in the cloud? If not, don't your think Leica should give us something for it?
Can you tell me why on earth when I did this scan the mobile app showed no SLAM failure warning and I saw the trajectory ending pretty much in the same spot where it started? This faulty scan alone has ruined a labour day 900km away from home!!!
DON'T EVER RELY ON A LEICA BLK2GO

[badam]

I have had too many cases when the irritating BLK2Go fails to keep track of the scanner orientation during a walk making it completely useless. However I can see parts that would be useful if I were able to remove a part where it gets mad.
The best would be to have select by time mark tool as one can find in MMS. is there any way to access time mark records for the points in the cloud? If not, don't your think Leica should give us something for it?
Can you tell me why on earth when I did this scan the mobile app showed no SLAM failure warning and I saw the trajectory ending pretty much in the same spot where it started? This faulty scan alone has ruined a labour day 900km away from home!!!
DON'T EVER RELY ON A LEICA BLK2GO

you could try to disable blk2go trajectory recalculation inside register 360.

Settings -> general -> BLK: use on-device SLAM

and then reimport the whole walk. but i'm with you 2go is a lottery. and very noisy. you should create a shortest walk possible, and multiple of it. for example create a walk which contains two room only. and do it twice that way, one of them is wrong you can load the other one.. Especially when you are working this far from your home.

[BrendanL]

you could try to disable blk2go trajectory recalculation inside register 360.

Settings -> general -> BLK: use on-device SLAM

and then reimport the whole walk. but i'm with you 2go is a lottery. and very noisy. you should create a shortest walk possible, and multiple of it. for example create a walk which contains two room only. and do it twice that way, one of them is wrong you can load the other one.. Especially when you are working this far from your home.

That was what we were told on initial release as well. With latest firmware however it was recommended by Leica that longer walks are used, and return to starting position in a loop. On the return walk, go into some of the areas you had originally walked through briefly (every 2nd room or so).

Eg, doing a full floor of units, go into each unit and every room (slowly through doors, Leica has recommended going sideways through doors for more overlap). Then return back to the start of walk, going into the main room of each unit, finishing back at the starting position.

We have had success with this new method(~20min walks).

But the data is still quite noisy, and we have the luxury of being able to revisit the site without much issue to rescan if there is any problems with a certain walk.

Basic outline for scan technique found at https://shop.leica-geosystems.com/leica ... techniques could also try asking your Leica rep for latest best practice

Biggest thing I've noticed on improving these kinds of misalignments is slowing walking speed to around 50-75% of normal walking speed and using sweeping motions when turning rather than just rotating on the spot.

[Tanguy Nédélec]

Oh yeah that's the problem with SLAM: the unreliability.

I would also like to have a time-based cropping tool, but mostly for cleaning up the pointcloud. To isolate a room and delete mirrors, for exemple. Or windows, if a walk has both interior and exterior.

Ideas for a Leica dev if one reads this.

[Attila]

Is it possible to export your raw data to ply? Cloud Compare can break it down.

[badam]

Is it possible to export your raw data to ply? Cloud Compare can break it down.

not if you don't have scalar field in the exported e57 with time...