e572las to extract a text file

[Albion Shabani]

Hello,

I am discovering e572las, and I was wondering if is it possible with e572las to extract a text file with the coordinates 0,0,0 of each station ?

Best regards,

Albion

[Martin Isenburg]

Hello,

my first approach would be to use e572las to split all scan positions into different LAS files and then use las2txt to create TXT files. If you do not want any of the transforms applied buf prefer the local coordinates then you need to use the approriate command line options for e572las when splitting from e57 to LAS.

http://lascloud.com/download/e572las_README.txt 

[...]   

 
  This tool reads LiDAR in the E57 format from a *.e57 file and
  converts it to either standard LAS, compressed LAZ, or simple
  ASCII TXT.

  By default all scans contained in the E57 file are merged into
  one output with all invalid points being omitted. The points of
  different scans are given different point source IDs so that the
  information which points belong to one scan is preserved.  It's
  possible to request '-split_scans' and '-include_invalid' to put
  points from different scans into separate files and/or to include
  invalid points as well.

  Another useful option is '-v' or '-verbose' that informs about
  the contents and the progress of processing.

  Below are some typical example command lines for the data that
  can be found here: http://www.libe57.org/data.html

  e572las -v -i pumpACartesian.e57 -o pumpACartesian.laz
  e572las -v -i Station018.e57 -o Station018.laz -set_scale 0.002 0.002 0.002
  e572las -v -i trimble.e57 -o trimble.laz
  e572las -v -i pump.e57 -o pump.las -split_scans
  e572las -v -i trimble.e57 -o trimble.txt -oparse xyzi
  e572las -v -i pump.e57 -o pump.laz -include_invalid

  By default the tool will apply transformations and/or rotations
  that it find stored in the pose of each scan. You can ask the tool
  not to apply those with '-no_pose'. To selevtively suppress only
  transformation or rotation use '-no_transformation' or '-no_rotation'

[...]  

 

Regards,

Martin

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[Albion Shabani]

We would like to find these coordinates of each station without having the need to split the e57 into stations.  Extract a text file with the coordinates 0,0,0 of each station and for every source id give a name (file name exemple test0001, test0002) so when for exemple we view it in 3D, 

thanks to the text we extracted we can be able to add labels to every station (the unified las + the source id for every station inside).

I will try to split the e57 to stations and than with las2text get the coordinates 0 0 0 for each of them, if I can get these coordinates than I will convert the e57 to an unified las and add 

the labels (source id) for every station inside since I know the coordinates.

Best regards,

Albion

---------- Forwarded message ---------
De : Martin Isenburg <martin....@gmail.com>
Date: mar. 25 févr. 2020 à 03:36
Subject: Re: [LAStools] e572las to extract a text file
To: LAStools - efficient command line tools for LIDAR processing <last...@googlegroups.com>

To view this discussion on the web visit https://groups.google.com/d/msgid/lastools/CABSWR-Ho3r%3Dpi7q9YYSwoh_M0XaMYNLXF1dnHn3bmhgUVyVYBQ%40mail.gmail.com.