[Liblas-devel] really big LAS/LAZ file for testing ...

[Martin Isenburg]

hello,

sometimes people look for a really really big LAS test file. here is
one. with 3,612,455,890 points it's close to the LAS 32 bit limit for
the number of point record field:

http://gisfiles.wm.edu/files/lidar/

below is it's lasinfo.

cheers,

martin

lasinfo -i va_lidarlasfiles.laz
reporting all LAS header entries:
  file signature:            'LASF'
  file source ID:            0
  reserved (global_encoding):0
  project ID GUID data 1-4:  1810419234 2160 18250 '╜╥>u╘╕♀►'
  version major.minor:       1.2
  system identifier:         'LAStools (c) by Martin Isenburg'
  generating software:       'created by lasmerge of LAStools'
  file creation day/year:    357/2010
  header size                227
  offset to point data       904
  number var. length records 4
  point data format          1
  point data record length   28
  number of point records    3612455890
  number of points by return 2551732960 552942921 346338399 161441610 0
  scale factor x y z         0.01 0.01 0.01
  offset x y z               0 0 0
  min x y z                  12200000.09 3560000.02 -163.37
  max x y z                  12422094.67 3919999.97 1101.33
the header is followed by 4 user-defined bytes
LASzip compression (version 1.0 r0): POINT10 1 GPSTIME11 1
reporting minimum and maximum for all 3612455890 LAS point record entries ...
  x 1220000009 1242209467
  y 356000002 391999997
  z -16337 110133
  intensity 1 4095
  edge_of_flight_line 0 1
  scan_direction_flag 0 1
  number_of_returns_of_given_pulse 1 4
  return_number 1 4
  classification 0 10
  scan_angle_rank -24 25
  user_data 32 32
  point_source_ID 1 101
  gps_time 0.000006 604799.999992
overview over number of returns of given pulse: 1998790293 413209094 554690283 6
45766220 0 0 0
histogram of classification of points:
     1053 Created, never classified (0)
 1540889813 Unclassified (1)
 1215591451 Ground (2)
 87160704 Low Point (noise) (7)
 760082153 Water (9)
  8730716 Reserved for ASPRS Definition (10)