Also ... the first file I looked at (ahn2_uitgefilterd/u01cz1.laz.zip) seems to be an XYZ conversion from ASCII to LAZ (-> without time stamps, scan angles, return counts, point source IDs...). Is all the data like this? The lack of flightline information certainly hurts the usability quite a bit ...
Also ... they surely mean "raw" LiDAR when they say "raw" LiDAR. See attached pic for a large amount of LiDAR noise points just below the aircraft. You can tell roughly how low the aircraft was flying. Maybe we can reconstruct the flightlines from that ... (-:
Kudos to the Dutch for following the Finnish and Danish example of opening their national LiDAR!!! Oh ... and you Germany, France, Sweden, Italy, Norway, Austria, Switzerland, Spain, United Kingdom etc ... don't you see how increasingly uncool you are becoming ... (-;
D:\lastools\bin>lasinfo u01cz1.laz -cd
reporting all LAS header entries:
file signature: 'LASF'
file source ID: 0
global_encoding: 0
project ID GUID data 1-4: 00000000-0000-0000-0000-000000000000
version major.minor: 1.2
system identifier: 'LAStools (c) by Martin Isenburg'
generating software: 'lasmerge (version 130623)'
file creation day/year: 236/2010
header size: 227
offset to point data: 227
number var. length records: 0
point data format: 0
point data record length: 20
number of point records: 12878037
number of points by return: 12878037 0 0 0 0
scale factor x y z: 0.01 0.01 0.01
offset x y z: 100000 600000 0
min x y z: 141403.75 600000.00 -1.37
max x y z: 145000.00 601956.54 386.46
LASzip compression (version 2.1r0 c2 50000): POINT10 2
reporting minimum and maximum for all LAS point record entries ...
X 4140375 4500000
Y 0 195654
Z -137 38646
intensity 0 0
return_number 1 1
number_of_returns 1 1
edge_of_flight_line 0 0
scan_direction_flag 0 0
classification 0 0
scan_angle_rank 0 0
user_data 0 0
point_source_ID 0 0
number of last returns: 12878037
covered area in square units/kilounits: 3599944/3.60
point density: all returns 3.58 last only 3.58 (per square units)
spacing: all returns 0.53 last only 0.53 (in units)
overview over number of returns of given pulse: 12878037 0 0 0 0 0 0
histogram of classification of points:
12878037 never classified (0)