RE: [LAStools] Txt2Laz?

[Stuart Mowbray]

Hi Jeff,

 

I believe LASZip itself will convert straight from ASCII/txt …

 

Examples from the LASZip readme:

 

>> laszip *.txt -iparse xyztairn

parses and compresses all ASCII files in the current folder.

 

>> laszip -lof file_list.txt

compresses (or uncompresses) all LAS/TXT (or LAZ) files listed in the

the text file 'file_list.txt'

 

>> laszip -i lidar.txt -iparse xyziRGB -itranslate_intensity 2047

 

parses the ASCII file 'lidar.txt' with parse string 'xyziRGB' and

converts it on-the-fly to LAS while translating the intensity with

an offset of 2047 and compresses it to the LAZ file 'lidar.laz'

 

>> laszip -i *.txt -iparse xyzt -iscale_intensity 65535

 

parses all ASCII file ending in *.txt with parse string 'xyzt' and

converts them on-the-fly to LAS while scaling the intensity with a

multiplier of 65535 and compresses it to a properly named LAZ file.

 

>> laszip -i *.txt -iparse xyzt -iscale_intensity 65535 -merged -o merged.laz

 

same as above but all matching ASCII files are merged into one LAS

file.

 

Regards,

 

Dr Stuart Mowbray

Software Engineer – MDL

Group Engineering Software

Renishaw plc

 

 

From: last...@googlegroups.com [mailto:last...@googlegroups.com] On Behalf Of Jeff Fagerman
Sent: 17 August 2012 02:01
To: last...@googlegroups.com
Subject: [LAStools] Txt2Laz?

 

Are you, or have you, added to your txt2las (etc) tools a means of going from txt to laz without first going to las (txt2las, laszip)? 

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[Martin Isenburg]

Hello Jeff,

Stuart gave one possible answer: every of the LAStools modules is also
an on-the-fly txt2las tool because you can specify ASCII input and use
the '-iparse xyz...' and '-iskip ...' command line flags to specify
how to parse the text file.

But there is another way to answer this: every of the LAS producing
LAStools modules is also a laszip compressor because you can specify
the output to be compressed with the '-olaz' command line flag or by
choosing an output file name that ends in '.laz'. Hence these are your
possibilities:

txt2las -i lidar.txt -parse xyziRGB -olaz
txt2las -i lidar.txt -parse xyziRGB -o lidar.laz

laszip -i lidar.txt -iparse xyziRGB -olaz
laszip -i lidar.txt -iparse xyziRGB -o lidar.laz

las2las -i lidar.txt -iparse xyziRGB -olaz
las2las -i lidar.txt -iparse xyziRGB -o lidar.laz

lasmerge -i lidar1.txt lidar2.txt -iparse xyziRGB -o merged.laz

Regards,

Martin @rapidlasso