lasinfo (180812) report for 1786 merged files reporting all LAS header entries: file signature: 'LASF' file source ID: 0 global_encoding: 17 project ID GUID data 1-4: B7601870-E0D0-468B-75A8-AAC30472328A version major.minor: 1.4 system identifier: 'Ayres Associates Lidar Suite ' generating software: 'Ayres Associates Lidar Suite ' file creation day/year: 122/2019 header size: 375 offset to point data: 1470 number var. length records: 1 point data format: 6 point data record length: 30 number of point records: 0 number of points by return: 0 0 0 0 0 scale factor x y z: 0.01 0.01 0.01 offset x y z: 0 0 0 min x y z: 599687.54 299345.40 -10.81 max x y z: 758892.91 523312.13 2895.96 start of waveform data packet record: 0 start of first extended variable length record: 0 number of extended_variable length records: 0 extended number of point records: 20457790119 extended number of points by return: 12032245679 4431642755 2715613681 1278288004 0 0 0 0 0 0 0 0 0 0 0 variable length header record 1 of 1: reserved 0 user ID 'LASF_Projection' record ID 2112 length after header 1037 description 'OGC WKT Coordinate System' WKT OGC COORDINATE SYSTEM: COMPD_CS["NAD_1983_2011_WISCRS_Clark (ftUS) + NAVD88 height - Geoid12B (ftUS)",PROJCS["NAD83(2011) / WISCRS Clark (ftUS)",GEOGCS["NAD83(2011)",DATUM["NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1116"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6318"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",43.6],PARAMETER["central_meridian",-90.70833333333334],PARAMETER["scale_factor",1.0000463003],PARAMETER["false_easting",655999.997],PARAMETER["false_northing",0.028],UNIT["US survey foot",0.3048006096012192,AUTHORITY["EPSG","9003"]],AXIS["X",EAST],AXIS["Y",NORTH],AUTHORITY["EPSG","7596"]],VERT_CS["NAVD88 height - Geoid12B (ftUS)",VERT_DATUM["North American Vertical Datum 1988",2005,AUTHORITY["EPSG","5103"]],HEIGHT_MODEL["US Geoid Model 2012B"],UNIT["US survey foot",0.304800609601219],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6360"]]] the header is followed by 4 user-defined bytes reporting minimum and maximum for all LAS point record entries ... X 59968754 75878919 Y 29942335 52229835 Z -1081 287277 intensity 17 65396 return_number 1 4 number_of_returns 1 4 edge_of_flight_line 0 1 scan_direction_flag 0 1 classification 1 20 scan_angle_rank -23 24 user_data 0 0 point_source_ID 46 1567 gps_time 209585782.792565 210188822.575776 extended_return_number 1 4 extended_number_of_returns 1 4 extended_classification 1 20 extended_scan_angle -3833 4000 extended_scanner_channel 0 0 number of first returns: 2497897309 number of intermediate returns: 848866079 number of last returns: 2500491917 number of single returns: 1552288010 WARNING: real number of point records (4294967295) is different from extended header entry (20457790119). WARNING: real extended number of points by return [1] is 2497897309 - different from header entry 12032245679. WARNING: real extended number of points by return [2] is 946868436 - different from header entry 4431642755. WARNING: real extended number of points by return [3] is 578962618 - different from header entry 2715613681. WARNING: real extended number of points by return [4] is 271238932 - different from header entry 1278288004. overview over extended number of returns of given pulse: 1552288010 735652354 924996010 1082030921 0 0 0 0 0 0 0 0 0 0 0 histogram of classification of points: 320483306 unclassified (1) 2313789285 ground (2) 1630284449 high vegetation (5) 6375845 building (6) 784614 noise (7) 3430746 water (9) 30814 bridge deck (17) 18953928 Reserved for ASPRS Definition (18) 834308 Reserved for ASPRS Definition (20) +-> flagged as extended overlap: 1915582827