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) _______________________________________________ Liblas-devel mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/liblas-devel
