topic Re: importing .las/.laz files in ReCap Forum

importing .las/.laz files

m.krajnc — Tue, 28 Apr 2020 12:12:56 GMT

When i try to open a .las or .laz (LIDAR) file in recap(2021 also try in 2020) it doesnt load the file and then nothing happens. The file size is about 30MB.

Thanks.

Re: importing .las/.laz files

Pointdump — Tue, 28 Apr 2020 20:59:19 GMT

Metod,
Please post your (zipped)files. This Forum accepts up to 75MB files.
Dave

Re: importing .las/.laz files

m.krajnc — Wed, 29 Apr 2020 05:53:32 GMT

Thanks for reply,
here is a link to the LIDAR website :http://gis.arso.gov.si/evode/profile.aspx?id=atlas_voda_Lidar@Arso&culture=en-US Before ReCAP i was working with CIVIl 3d (2016) and there were no issues with .las files.

file types .laz and .las cannot be uploaded to forum.

Thanks

Re: importing .las/.laz files

Pointdump — Wed, 29 Apr 2020 08:24:19 GMT

Metod,
That's a big country. I don't know what area you were interested in.
Please zip together your las/laz files. This Forum will accept anything zipped, up to 75MB.
Dave

Re: importing .las/.laz files

m.krajnc — Wed, 29 Apr 2020 08:52:47 GMT

here is the attachment (.zlas)
This is a random area, I have problems with all areas, if you click anywhere on area in LIDAR it appears window with files. Area in Lidar are 1 sguare km.

Re: importing .las/.laz files

Pointdump — Wed, 29 Apr 2020 09:23:39 GMT

Metod,
The zLas format is a proprietary Esri format, so ReCap can't do anything with it until you >>>Liberate<<< it.
Dave

Re: importing .las/.laz files

Pointdump — Wed, 29 Apr 2020 09:53:29 GMT

Metod,
After that zLas file is Liberated, it imports nicely into ReCap. The only problem is that ReCap doesn't know what coordinate system to assign. You'll need to get metadata from the website.

Dave

Re: importing .las/.laz files

m.krajnc — Wed, 29 Apr 2020 11:08:08 GMT

🤔

For decompressing or converting from .zlas to .las i use LAS optimizer (https://www.arcgis.com/home/item.html?id=787794cdbd384261bc9bf99a860a374f) i think it is a similar software as LASliberator. I tried with "liberator" and the Recap also did nothing. When i load the file in recap it shows it on upper left corner but doesnt load it. I can also index file. Then it shows me the remaining time which is a few minutes but after a few hours nothing happens. Only one time ReCap load file and made a point cloud from .laz.file and the all process took few seconds so i don't think it's a problem with comp. hardware.

I really don't know what to do.

Re: importing .las/.laz files

Pointdump — Wed, 29 Apr 2020 13:00:06 GMT

Metod,
ESRI's LAS optimizer also works to Liberate a zLAS file.
So getting back to the problem at hand, you may need to do a Repair or Re-Install of ReCap. I think there's a new version out too. (Version 7.0?)
Dave

Re: importing .las/.laz files

m.krajnc — Mon, 04 May 2020 09:13:34 GMT

Thanks for reply

I made a repair and Re-installed Recap (2020 and 2021 version 7.0.....). The problem remains the same.

is it possible that something is wrong with ReCap settings?

Re: importing .las/.laz files

Pointdump — Mon, 04 May 2020 09:24:03 GMT

Metod,
"...is it possible that something is wrong with ReCap settings?"
That's most likely, since I had no problem using the Liberated TMR_591_182 file in ReCap. Please post a Screen Cast or series of Screen Shots of your work flow (steps).
Dave

Re: importing .las/.laz files

Pointdump — Mon, 04 May 2020 09:49:06 GMT

Metod,
I dug into the website and it looks like they also have the data in LAZ, which saves you the step of "liberating". But I can't read Slovenian, so I'm unable to determine the Metadata. Is >>>This<<< the correct Coordinate System?

Dave

Re: importing .las/.laz files

m.krajnc — Mon, 04 May 2020 10:42:47 GMT

D48GK is an older coordinate system and D96GK (ETRS) is a new C.S. We use both.

GKOT means that buildings and forest are taken into point cloud and

OTR is clean surface without forest and buildings.

i tried with .las and laz files.

Slovenia national C.S. is ETRS89

https://epsg.io/4937

Re: importing .las/.laz files

m.krajnc — Mon, 04 May 2020 11:49:06 GMT

here is my work flow (attachment)

Re: importing .las/.laz files

Pointdump — Mon, 04 May 2020 14:46:12 GMT

Metod,
I used the OTR file(Attached) which removes everything but Ground Points from:

1484263 never classified (0)
2574 unclassified (1)
7968387 ground (2)
116525 low vegetation (3)
800038 medium vegetation (4)
3890419 high vegetation (5)
140085 building (6)
8031 noise (7)

It took me about 30 seconds to import the LAZ file into ReCap. I don't know what the problem might be. Are you using "Run as Administrator" to use ReCap? Have you tried signing in as a different Windows User? That's about all I can think of.

Dave

Re: importing .las/.laz files

m.krajnc — Tue, 05 May 2020 11:53:14 GMT

I installed the recap on another computer and got error message "could not import scan!" I think
it could be a problem in the .las/.laz files...

Re: importing .las/.laz files

tpennerNXGJH — Thu, 27 Jan 2022 18:58:40 GMT

I'm having a similar problem. We're still using this ancient Civil3d 2018 version at the moment. Waiting on IT to get their stuff together so we can FINALLY upgrade. We got LAZ files from a client. Everytime I try to load it I get this;

Unfortunately the files are 400mb big so I can't attach to this message. Is there a way to determine if the file is corrupt? Or is it possible that my Recap 2018 is too out of date? We really need to get these lidar working but at this point I really don't know what to do.

Travis

Re: importing .las/.laz files

m.krajnc — Thu, 27 Jan 2022 19:49:36 GMT

try to convert .LAZ to .TXT with this LAStools and load into the ReCap. LAStool is a bit outdated software but it works great for me.

LINK: LAStools: converting, filtering, viewing, processing, and compressing LIDAR data in LAS format (unc.edu)

(i hope the connection is correct, the program looks like this; see the screenshot )

Re: importing .las/.laz files

Pointdump — Thu, 27 Jan 2022 19:49:51 GMT

Travis,
You can post your LAZ's by using WeTransfer, DropBox, MEGA, OneDrive, or Autodesk Drive.
Dave

Re: importing .las/.laz files

tpennerNXGJH — Thu, 27 Jan 2022 21:47:02 GMT

Isn't LASTools based on arcGIS? As in - I would need to own a copy of arcGIS to be able to use it? There's no executables in the zip so I don't know how I'm expected to use it.