Combining LAS files

Introduce yourself.
Post Reply
MCook
I have made <0 posts
I have made <0 posts
Posts: 3
Joined: Wed Jul 15, 2015 7:49 pm
8
Full Name: Michael
Company Details: Certainty3D
Company Position Title: Lead Applications Engineer
Country: USA
Linkedin Profile: Yes

Combining LAS files

Post by MCook »

Hello All,

Is there a way to combine two similar LAS files into one? The scenario here is that I have two of the same LAS files but with varying record information. For example, one has RGB and the other has Classification but I'd need both RGB and Classification to be assigned for the final combined LAS file. Is this possible?

Thank you,
User avatar
Scott.Warren
V.I.P Member
V.I.P Member
Posts: 364
Joined: Tue Jan 30, 2018 3:14 pm
6
Full Name: Scott Warren
Company Details: WSP Canada
Company Position Title: Project Manager - Geomatics Engineer
Country: Canada
Linkedin Profile: Yes
Location: Dartmouth, Nova Scotia, Canada
Has thanked: 44 times
Been thanked: 111 times
Contact:

Re: Combining LAS files

Post by Scott.Warren »

LasTools might be what you want to look into. It is a free to use program that has a wide array of tools for working with LAS files. I've never tried to separate out a particular column/portion of data, but i wouldn't be surprised if LasTools could.

https://rapidlasso.com/lastools/
https://rapidlasso.com/lastools/lasmerge/

Sorry I don't have a definitive answer.
max72
V.I.P Member
V.I.P Member
Posts: 846
Joined: Tue Feb 26, 2013 9:32 pm
11
Full Name: Massimo De Marchi
Company Details: Massimo De Marchi
Company Position Title: freelancer
Country: Italy
Skype Name: massimo_de_marchi
Has thanked: 15 times
Been thanked: 53 times
Contact:

Re: Combining LAS files

Post by max72 »

for color maybe cloudcompare?

http://www.cloudcompare.org/doc/wiki/in ... her_entity

Massimo
ing. Massimo De Marchi - +39 347 32 17 049 - www.studiodemarchi.net
sisraelson
I have made <0 posts
I have made <0 posts
Posts: 2
Joined: Thu Jun 14, 2018 5:09 pm
5
Full Name: Sean Israelson
Company Details: PA Spatial Solutions Inc
Company Position Title: Field Sales Specialist
Country: Canada
Linkedin Profile: Yes

Re: Combining LAS files

Post by sisraelson »

Cloud compare using manual or automated registration and the merge function will get you where you need to be

There is also an automated center for spherical targets to help register multiple scans
User avatar
gblawes
I have made <0 posts
I have made <0 posts
Posts: 5
Joined: Thu Sep 11, 2014 7:51 pm
9
Full Name: Greg Lawes
Company Details: point3D
Company Position Title: Principal
Country: USA
Skype Name: gblawes
Linkedin Profile: Yes
Location: US East Coast, Gulf Coast
Contact:

Re: Combining LAS files

Post by gblawes »

Take a look at 3DPointLogic from Solv3D at https://solv3d.com/products/3dpointlogic/. 3DPointLogic is a powerful application with user-friendly graphical interface that processes 3D point cloud data from ANY source (UAV/drone, mobile, static). 3DPointLogic includes optimized methods for
Point Cloud Processing, Format conversion,Tiling, Transformation, QA/QC and Validation, and is bundled with a unique LAS viewer. Web site has a 30-day eval.
Greg.

Gregory B. Lawes
point3D - email [email protected] - phone (800) 616-1003 - Skype gblawes - web www.point3D.com - Linkedin company/point3d-inc
User avatar
smacl
Global Moderator
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: Combining LAS files

Post by smacl »

Michael,

First port of call would probably be Martin Isenburg and LASTools as already suggested, but if the data sets aren't identical (i.e. good 1-1 correspondence of all points), the solution could be time consuming as your going through millions of points to get the nearest point in a dataset of millions more points. I'd probably go with either an octree or voxel map if I had to write it myself, but it is not quite as trivial as it appears at face value.
Shane MacLaughlin
Atlas Computers Ltd
www.atlascomputers.ie

SCC Point Cloud module
MCook
I have made <0 posts
I have made <0 posts
Posts: 3
Joined: Wed Jul 15, 2015 7:49 pm
8
Full Name: Michael
Company Details: Certainty3D
Company Position Title: Lead Applications Engineer
Country: USA
Linkedin Profile: Yes

Re: Combining LAS files

Post by MCook »

smacl wrote: Sun Jun 17, 2018 4:59 pm Michael,

First port of call would probably be Martin Isenburg and LASTools as already suggested, but if the data sets aren't identical (i.e. good 1-1 correspondence of all points), the solution could be time consuming as your going through millions of points to get the nearest point in a dataset of millions more points. I'd probably go with either an octree or voxel map if I had to write it myself, but it is not quite as trivial as it appears at face value.
The two data sets will be identical and I'll definitely have to give LASTools a look as they keep popping up in conversation. Essentially I've been given two identical pointclouds that have been run through 2 different processes, one that assigned RGB and one that assigned classification. Now I'm looking to merge these assigned bits of information into one final complete LAS file.

Thank you for your input!
User avatar
lastools
V.I.P Member
V.I.P Member
Posts: 144
Joined: Tue Mar 16, 2010 3:06 am
14
Full Name: Martin Isenburg
Company Details: rapidlasso - fast tools to catch reality
Company Position Title: creators of LAStools and LASzip
Country: Germany
Skype Name: isenburg
Linkedin Profile: Yes
Been thanked: 1 time
Contact:

Re: Combining LAS files

Post by lastools »

Hello from @LAStools,

indeed, the lascopy tool of LAStools should be able to do this efficiently already (and if not it is easy to add). For a free solution you could use the free and open source las2txt to convert the relevant columns of both files into two large ASCII text files, then somehow merge the entries for each point into one line, and then use the free and open source txt2las on the combined ASCII text file to go back to a LAS file that then combines all the attributes.

Regards,

Martin @rapidlasso
Post Reply

Return to “Introductions”