convert LAS 1.2 to LAS 1.4 (easy peasy & free)
1,256 views
Skip to first unread message
Martin Isenburg
Apr 20, 2015, 1:31:24 PM4/20/15
to The LAS room - a friendly place to discuss specifications of the LAS format, LAStools - efficient command line tools for LIDAR processing
Hello,
we get a lot of questions from North America about converting LAS 1.2 files (using point type 1) to LAS 1.4 files (using point type 6). This is because the new point types of LAS 1.4 are now the required delivery for the United States Geological Survey (USGS) 3D Elevation Program. This can easily be done like this:
we get a lot of questions from North America about converting LAS 1.2 files (using point type 1) to LAS 1.4 files (using point type 6). This is because the new point types of LAS 1.4 are now the required delivery for the United States Geological Survey (USGS) 3D Elevation Program. This can easily be done like this:
las2las -i ..\data\fusa.laz -set_version 1.4 -set_point_type 6 -o fusa14.las
You can then also compress and decompress them (latest version only):
laszip -i fusa14.las -o fusa14.laz
laszip -i fusa14.laz -o fusa14_dec.las
lasdiff -i fusa14.las -i fusa14_dec.las
checking 'fusa14.las' against 'fusa14_dec.las'
headers are identical.
raw points are identical.
files are identical. both have 277573 points. took 0.062 secs.
For point type 7 (with RGB colors) the command is basically the same:
las2las -i ..\data\fusa.laz -set_version 1.4 -set_point_type 7 -o fusa14col.las
The lasinfo reports for the original LAS 1.2 file (fusa.laz) and the up-converted LAS 1.4 files using point type 6 (fusa14.las) and point type 7 (fusa14_col.las).
Regards,
Martin @rapidlasso
PS: And please don't use GPS week but Adjusted GPS Standard time.
Balbahadur Bist
Sep 27, 2018, 9:00:39 PM9/27/18
to LAStools - efficient tools for LiDAR processing
Hi
ineed las 1.2 to laz 1.4
can it possible
Martin Isenburg
Sep 30, 2018, 11:28:51 AM9/30/18
to LAStools - efficient command line tools for LIDAR processing
Hello,
while keeping current LAS 1.2 point type:
las2las -i ..\data\fusa.laz -set_version 1.4 -o fusa14.laz
while also upgrading point type from 1 to 6 (similar for 3 to 7):
las2las -i ..\data\fusa.laz -set_version 1.4 -set_point_type 6 -o fusa14pt6.laz
below the results:
below the results:
===================================
lasinfo -i fusa14.laz
lasinfo (180919) report for 'fusa14.laz'
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: 1.4
system identifier: 'LAStools (c) by rapidlasso GmbH'
generating software: 'las2las (version 180930)'
file creation day/year: 40/2010
header size: 375
offset to point data: 469
number var. length records: 1
point data format: 1
point data record length: 28
number of point records: 277573
number of points by return: 263413 13879 281 0 0
scale factor x y z: 0.01 0.01 0.01
offset x y z: 0 0 0
min x y z: 277750.00 6122250.00 42.21
max x y z: 277999.99 6122499.99 64.35
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: 277573
extended number of points by return: 263413 13879 281 0 0 0 0 0 0 0 0 0 0 0 0
variable length header record 1 of 1:
reserved 43707
user ID 'LASF_Projection'
record ID 34735
length after header 40
description 'by LAStools of Martin Isenburg'
GeoKeyDirectoryTag version 1.1.0 number of keys 4
key 1024 tiff_tag_location 0 count 1 value_offset 1 - GTModelTypeGeoKey: ModelTypeProjected
key 3072 tiff_tag_location 0 count 1 value_offset 32754 - ProjectedCSTypeGeoKey: WGS 84 / UTM 54S
key 3076 tiff_tag_location 0 count 1 value_offset 9001 - ProjLinearUnitsGeoKey: Linear_Meter
key 4099 tiff_tag_location 0 count 1 value_offset 9001 - VerticalUnitsGeoKey: Linear_Meter
LASzip compression (version 3.2r5 c2 50000): POINT10 2 GPSTIME11 2
reporting minimum and maximum for all LAS point record entries ...
X 27775000 27799999
Y 612225000 612249999
Z 4221 6435
intensity 10 62293
return_number 1 3
number_of_returns 1 3
edge_of_flight_line 0 0
scan_direction_flag 0 0
classification 1 6
scan_angle_rank 79 103
user_data 0 197
point_source_ID 1 1
gps_time 5880.963028 5886.739738
number of first returns: 263413
number of intermediate returns: 283
number of last returns: 263370
number of single returns: 249493
overview over extended number of returns of given pulse: 249493 27232 848 0 0 0 0 0 0 0 0 0 0 0 0
histogram of classification of points:
17553 unclassified (1)
180868 ground (2)
37030 high vegetation (5)
42122 building (6)
===================================
lasinfo -i fusa14pt6.laz
lasinfo (180919) report for 'fusa14pt6.laz'
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: 1.4
system identifier: 'LAStools (c) by rapidlasso GmbH'
generating software: 'las2las (version 180930)'
file creation day/year: 40/2010
header size: 375
offset to point data: 469
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: 277750.00 6122250.00 42.21
max x y z: 277999.99 6122499.99 64.35
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: 277573
extended number of points by return: 263413 13879 281 0 0 0 0 0 0 0 0 0 0 0 0
variable length header record 1 of 1:
reserved 43707
user ID 'LASF_Projection'
record ID 34735
length after header 40
description 'by LAStools of Martin Isenburg'
GeoKeyDirectoryTag version 1.1.0 number of keys 4
key 1024 tiff_tag_location 0 count 1 value_offset 1 - GTModelTypeGeoKey: ModelTypeProjected
key 3072 tiff_tag_location 0 count 1 value_offset 32754 - ProjectedCSTypeGeoKey: WGS 84 / UTM 54S
key 3076 tiff_tag_location 0 count 1 value_offset 9001 - ProjLinearUnitsGeoKey: Linear_Meter
key 4099 tiff_tag_location 0 count 1 value_offset 9001 - VerticalUnitsGeoKey: Linear_Meter
LASzip compression (version 3.2r5 c3 50000): POINT14 3
reporting minimum and maximum for all LAS point record entries ...
X 27775000 27799999
Y 612225000 612249999
Z 4221 6435
intensity 10 62293
return_number 1 3
number_of_returns 1 3
edge_of_flight_line 0 0
scan_direction_flag 0 0
classification 1 6
scan_angle_rank 79 103
user_data 0 197
point_source_ID 1 1
gps_time 5880.963028 5886.739738
extended_return_number 1 3
extended_number_of_returns 1 3
extended_classification 1 6
extended_scan_angle 13167 17167
extended_scanner_channel 0 0
number of first returns: 263413
number of intermediate returns: 283
number of last returns: 263370
number of single returns: 249493
overview over extended number of returns of given pulse: 249493 27232 848 0 0 0 0 0 0 0 0 0 0 0 0
histogram of classification of points:
17553 unclassified (1)
180868 ground (2)
37030 high vegetation (5)
42122 building (6) --
Download LAStools at
http://lastools.org
http://rapidlasso.com
Be social with LAStools at
http://facebook.com/LAStools
http://twitter.com/LAStools
http://linkedin.com/groups/LAStools-4408378
Manage your settings at
http://groups.google.com/group/lastools/subscribe
Reply all
Reply to author
Forward
0 new messages