LASzip ERROR: "compressed with an experimental version of laszip"
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Martin Isenburg
Jul 12, 2014, 8:27:14 AM7/12/14
to The LAS room - a friendly place to discuss specifications of the LAS format, LAStools - efficient command line tools for LIDAR processing, HAREN Tod H
Hello,
occasionally I get emails like the one below. This error message
indicates that the LAS file was compressed with an old "academic
prototype" version of laszip.exe that I - at the time - had been put
on my Web page merely to accompany a paper on LiDAR point compression
without reordering that I was writing. I was suprised to find out
later that some companies and agencies had downloaded my
proof-of-concept compressor and used it in actual production work and
to deliver LiDAR data. A bit more on the hisotry of LASzip here
http://groups.google.com/d/topic/lastools/54piq8kfuWk/discussion
So whenever you encounter the error message below you have one of
those pre 2011 LASzip encoded LAS files. In this case please do as you
are told: I have kept a number of those older laszip.exe prototype
compressors around in order to help you recover the academic
legacy-coded content that the officially released open source LASzip
compressor doesn't support.
ERROR: this file was compressed with an experimental version of laszip
ERROR: please contact 'martin....@rapidlasso.com' for assistance.
ERROR: cannot open lasreaderlas with file name 'c:\temp\44123A7307.laz'
ERROR: cannot open lasreader
Regards,
Martin @rapidlasso
On Sat, Jul 12, 2014 at 1:04 AM, HAREN Tod H <tod.h...@state.or.us> wrote:
> I am trying to process some lidar tiles that were compressed with laszip,
> but get the following error when I use lasinfo.exe. Also, attempting to
> read the header using liblas with Python raises an error. Both lastools and
> liblas are most recent versions. I have also tried processing these files
> with the FUSION tools, which includes version 2.2 of laszip.dll, but I get
> the same basic error message. The date on the laz files is 6/20/2011. We
> may be able to locate the laszip executable that was used to do the
> compression in a project folder, but short of that is there another
> solution?
>
> lasinfo.exe error:
> ERROR: this file was compressed with an experimental version of laszip
> ERROR: please contact 'martin....@rapidlasso.com' for assistance.
> ERROR: cannot open lasreaderlas with file name 'c:\temp\44123A7307.laz'
> ERROR: cannot open lasreader
>
> FUSION catalog.exe error message:
> Catalog v2.11 (FUSION v3.42) (Built on Mar 28 2014 09:43:58) DEBUG
> Using LASzip.dll (c) Martin Isenburg--Rapidlasso for LAS/LAZ file access
> LASzip.dll V2.2 r0 (build 130917)
> Command line: c:\FUSION\catalog.exe c:\temp\44123A7307.laz
> Run started: Fri Jul 11 15:59:35 2014
> Scanning file 1 of 1: c:\temp\44123A7307.laz...No data or only a single
> point in file...file not included in catalog
> Validation image file produced:
> Catalog.html Jul 11, 2014 @ 3:59 PM
> Run finished: Fri Jul 11 15:59:35 2014 (elapsed time: 0 seconds)
>
> Done
>
> LASzip DLL error: this file was compressed with an experimental version of
> LASzip. contact 'martin....@rapidlasso.com' for assistance
>
> Thanks for your help and an otherwise great lidar utility.
>
> Tod Haren
> Oregon Dept. of Forestry
> (503) 945-7370
occasionally I get emails like the one below. This error message
indicates that the LAS file was compressed with an old "academic
prototype" version of laszip.exe that I - at the time - had been put
on my Web page merely to accompany a paper on LiDAR point compression
without reordering that I was writing. I was suprised to find out
later that some companies and agencies had downloaded my
proof-of-concept compressor and used it in actual production work and
to deliver LiDAR data. A bit more on the hisotry of LASzip here
http://groups.google.com/d/topic/lastools/54piq8kfuWk/discussion
So whenever you encounter the error message below you have one of
those pre 2011 LASzip encoded LAS files. In this case please do as you
are told: I have kept a number of those older laszip.exe prototype
compressors around in order to help you recover the academic
legacy-coded content that the officially released open source LASzip
compressor doesn't support.
ERROR: this file was compressed with an experimental version of laszip
ERROR: please contact 'martin....@rapidlasso.com' for assistance.
ERROR: cannot open lasreaderlas with file name 'c:\temp\44123A7307.laz'
ERROR: cannot open lasreader
Regards,
Martin @rapidlasso
On Sat, Jul 12, 2014 at 1:04 AM, HAREN Tod H <tod.h...@state.or.us> wrote:
> I am trying to process some lidar tiles that were compressed with laszip,
> but get the following error when I use lasinfo.exe. Also, attempting to
> read the header using liblas with Python raises an error. Both lastools and
> liblas are most recent versions. I have also tried processing these files
> with the FUSION tools, which includes version 2.2 of laszip.dll, but I get
> the same basic error message. The date on the laz files is 6/20/2011. We
> may be able to locate the laszip executable that was used to do the
> compression in a project folder, but short of that is there another
> solution?
>
> lasinfo.exe error:
> ERROR: this file was compressed with an experimental version of laszip
> ERROR: please contact 'martin....@rapidlasso.com' for assistance.
> ERROR: cannot open lasreaderlas with file name 'c:\temp\44123A7307.laz'
> ERROR: cannot open lasreader
>
> FUSION catalog.exe error message:
> Catalog v2.11 (FUSION v3.42) (Built on Mar 28 2014 09:43:58) DEBUG
> Using LASzip.dll (c) Martin Isenburg--Rapidlasso for LAS/LAZ file access
> LASzip.dll V2.2 r0 (build 130917)
> Command line: c:\FUSION\catalog.exe c:\temp\44123A7307.laz
> Run started: Fri Jul 11 15:59:35 2014
> Scanning file 1 of 1: c:\temp\44123A7307.laz...No data or only a single
> point in file...file not included in catalog
> Validation image file produced:
> Catalog.html Jul 11, 2014 @ 3:59 PM
> Run finished: Fri Jul 11 15:59:35 2014 (elapsed time: 0 seconds)
>
> Done
>
> LASzip DLL error: this file was compressed with an experimental version of
> LASzip. contact 'martin....@rapidlasso.com' for assistance
>
> Thanks for your help and an otherwise great lidar utility.
>
> Tod Haren
> Oregon Dept. of Forestry
> (503) 945-7370
Daniel Gann
Feb 1, 2021, 7:35:22 AM2/1/21
to LAStools - efficient tools for LiDAR processing
Hi Martin,
Thank you for the invitation to this group. I searched for the error message and found a response for this type of error here. The files I am trying to convert are 2017 compressed LiDAR files. But if I understood correctly, the agency might have used the pre-2011 version of LAS tools to compress their 2017 data?
So whenever you encounter the error message below you have one of
those pre 2011 LASzip encoded LAS files. In this case please do as you
are told: I have kept a number of those older laszip.exe prototype
compressors around in order to help you recover the academic
legacy-coded content that the officially released open source LASzip
compressor doesn't support.
those pre 2011 LASzip encoded LAS files. In this case please do as you
are told: I have kept a number of those older laszip.exe prototype
compressors around in order to help you recover the academic
legacy-coded content that the officially released open source LASzip
compressor doesn't support.
Where can I access the older version of the LASzip.exe that might have been used for compression?
Thank you for the quick response and the great tools you developed over the years.
Daniel
Martin Isenburg
Feb 1, 2021, 7:47:49 AM2/1/21
to LAStools - efficient command line tools for LIDAR processing
Hello Daniel,
for files from 2017 it is highly unlikely that this "old academic prototype" of LAStools was used. Most likely something else triggers this error message, something that may require fixing. Can you upload a small sample LAZ file for where this happens to some cloud service and share a link with me?
Regards,
Regards,
Martin
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Daniel Gann
Feb 1, 2021, 8:17:06 AM2/1/21
to LAStools - efficient command line tools for LIDAR processing
Yes, I agree that would be a bit strange.
I got the files here:
Does this work for you to test?
Thanks,
Daniel
---
Daniel Gann
Assistant Professor
Assistant Professor
Department of Biological Sciences
Florida International University
Miami, FL 33199
phone: 305-348-1971
From: last...@googlegroups.com <last...@googlegroups.com> on behalf of Martin Isenburg <martin....@gmail.com>
Sent: Monday, February 1, 2021 7:47 AM
To: LAStools - efficient command line tools for LIDAR processing <last...@googlegroups.com>
Subject: Re: [LAStools] Re: LASzip ERROR: "compressed with an experimental version of laszip"
Sent: Monday, February 1, 2021 7:47 AM
To: LAStools - efficient command line tools for LIDAR processing <last...@googlegroups.com>
Subject: Re: [LAStools] Re: LASzip ERROR: "compressed with an experimental version of laszip"
Note: This message originated from outside the FIU Faculty/Staff email system.
To view this discussion on the web visit
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Kirk Waters - NOAA Federal
Feb 1, 2021, 8:32:17 AM2/1/21
to LAStools - efficient command line tools for LIDAR processing
That is odd. We never used (or even had) that experimental version of laszip.
Kirk Waters, PhD, BJCP | NOAA Office for Coastal Management
Applied Sciences Program | 2234 South Hobson Ave
843-740-1227 (empty office) | Charleston, SC 29405
843-740-1227 (empty office) | Charleston, SC 29405
843-324-2203 (cell during COVID)
To view this discussion on the web visit https://groups.google.com/d/msgid/lastools/BN6PR05MB3668A47631F37130C3BD3F66B8B69%40BN6PR05MB3668.namprd05.prod.outlook.com.
Martin Isenburg
Feb 1, 2021, 8:35:12 AM2/1/21
to LAStools - efficient command line tools for LIDAR processing
No problems for me:
E:\software\LAStools\bin>laszip -check -i c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz
SUCCESS for 'c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz'
E:\software\LAStools\bin>lasinfo -i c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz
lasinfo (210128) report for 'c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz'
reporting all LAS header entries:
file signature: 'LASF'
file source ID: 0
global_encoding: 17
project ID GUID data 1-4: 748E0B39-AA3E-4B84-0000-000000000000
version major.minor: 1.4
system identifier: 'NOAA OCM'
generating software: 'datum_shift (0 )'
file creation day/year: 164/2018
header size: 375
offset to point data: 6272
number var. length records: 3
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: 0.0000001 0.0000001 0.01
offset x y z: -80 26 0
min x y z: -80.8890694 26.3282080 -85.61
max x y z: -80.8814297 26.3350918 104.45
start of waveform data packet record: 0
start of first extended variable length record: 28359415
number of extended_variable length records: 0
extended number of point records: 7151236
extended number of points by return: 6004909 979295 152888 13472 655 17 0 0 0 0 0 0 0 0 0
variable length header record 1 of 3:
reserved 0
user ID 'LASF_Spec'
record ID 7
length after header 985
description 'OGC WKT Coordinate System'
variable length header record 2 of 3:
reserved 0
user ID 'LASF_Spec'
record ID 0
length after header 4096
description 'Classification Lookup'
0 Never Classifie 1 Unclassified 2 Ground 3 Low Vegetation 4 Medium Vegetati 5 High Vegetation 6 Building 7 Low Point (nois 8 Model Key Point 9 Water 10 Ignore
d 11 Road Surface 12 Reserved 13 Wire - Guard 14 Wire-Conductor 15 Transmission To 16 Wire-structure 17 Bridge Deck 18 High Noise 19 20 21 22 23
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
54 55 56 57 58 59 60 61 62 63 64 Flown Outside o 65 Temporal Ground 66 67 68 69 70 71 72 73 74 75 76
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
variable length header record 3 of 3:
reserved 0
user ID 'LASF_Projection'
record ID 2112
length after header 652
description 'by LAStools of rapidlasso GmbH'
WKT OGC COORDINATE SYSTEM:
COMPD_CS["NAD83(2011); NAVD88 height",GEOGCS["NAD83(2011)",DATUM["NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY
,"1116"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6318"]],VERT_CS["NAVD88 height",VERT_DATUM["North American
l Datum 1988",2005,EXTENSION["PROJ4_GRIDS","g2012a_conus.gtx,g2012a_alaska.gtx,g2012a_guam.gtx,g2012a_hawaii.gtx,g2012a_puertorico.gtx,g2012a_samoa.gtx"],AUTHORITY["EPSG","5103"]],UNIT["Foot_US
8006096012192],AXIS["Up",UP],AUTHORITY["EPSG","5703"]]]
the header is followed by 2 user-defined bytes
LASzip compression (version 3.4r1 c3 50000): POINT14 3
reporting minimum and maximum for all LAS point record entries ...
X -8890694 -8814297
Y 3282080 3350918
Z -8561 10445
intensity 1 3813
return_number 1 6
number_of_returns 1 6
edge_of_flight_line 0 0
scan_direction_flag 0 0
classification 1 18
scan_angle_rank -31 15
user_data 0 0
point_source_ID 2 3
gps_time 166990440.324050 166990626.865244
extended_return_number 1 6
extended_number_of_returns 1 6
extended_classification 1 18
extended_scan_angle -5167 2500
extended_scanner_channel 0 0
number of first returns: 6004909
number of intermediate returns: 167133
number of last returns: 6004242
number of single returns: 5025048
overview over extended number of returns of given pulse: 5025048 1653117 418470 51301 3198 102 0 0 0 0 0 0 0 0 0
histogram of classification of points:
5337772 unclassified (1)
1794636 ground (2)
225 noise (7)
11745 water (9)
3255 rail (10)
3234 bridge deck (17)
369 Reserved for ASPRS Definition (18)
+-> flagged as withheld: 976791
+---> 976791 of those are unclassified (1)
+-> flagged as extended overlap: 912483
+---> 651644 of those are unclassified (1)
+---> 259801 of those are ground (2)
+---> 19 of those are noise (7)
+---> 491 of those are water (9)
+---> 289 of those are rail (10)
+---> 233 of those are bridge deck (17)
+---> 6 of those are Reserved for ASPRS Definition (18)
E:\software\LAStools\bin>laszip -check -i c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz
SUCCESS for 'c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz'
E:\software\LAStools\bin>lasinfo -i c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz
lasinfo (210128) report for 'c:\Users\Martin\Downloads\20161228_FL_PalmBeachCo_2016_692500_725000.laz'
reporting all LAS header entries:
file signature: 'LASF'
file source ID: 0
global_encoding: 17
project ID GUID data 1-4: 748E0B39-AA3E-4B84-0000-000000000000
version major.minor: 1.4
system identifier: 'NOAA OCM'
generating software: 'datum_shift (0 )'
file creation day/year: 164/2018
header size: 375
offset to point data: 6272
number var. length records: 3
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: 0.0000001 0.0000001 0.01
offset x y z: -80 26 0
min x y z: -80.8890694 26.3282080 -85.61
max x y z: -80.8814297 26.3350918 104.45
start of waveform data packet record: 0
start of first extended variable length record: 28359415
number of extended_variable length records: 0
extended number of point records: 7151236
extended number of points by return: 6004909 979295 152888 13472 655 17 0 0 0 0 0 0 0 0 0
variable length header record 1 of 3:
reserved 0
user ID 'LASF_Spec'
record ID 7
length after header 985
description 'OGC WKT Coordinate System'
variable length header record 2 of 3:
reserved 0
user ID 'LASF_Spec'
record ID 0
length after header 4096
description 'Classification Lookup'
0 Never Classifie 1 Unclassified 2 Ground 3 Low Vegetation 4 Medium Vegetati 5 High Vegetation 6 Building 7 Low Point (nois 8 Model Key Point 9 Water 10 Ignore
d 11 Road Surface 12 Reserved 13 Wire - Guard 14 Wire-Conductor 15 Transmission To 16 Wire-structure 17 Bridge Deck 18 High Noise 19 20 21 22 23
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
54 55 56 57 58 59 60 61 62 63 64 Flown Outside o 65 Temporal Ground 66 67 68 69 70 71 72 73 74 75 76
78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154
156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204
206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
variable length header record 3 of 3:
reserved 0
user ID 'LASF_Projection'
record ID 2112
length after header 652
description 'by LAStools of rapidlasso GmbH'
WKT OGC COORDINATE SYSTEM:
COMPD_CS["NAD83(2011); NAVD88 height",GEOGCS["NAD83(2011)",DATUM["NAD83_National_Spatial_Reference_System_2011",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY
,"1116"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","6318"]],VERT_CS["NAVD88 height",VERT_DATUM["North American
l Datum 1988",2005,EXTENSION["PROJ4_GRIDS","g2012a_conus.gtx,g2012a_alaska.gtx,g2012a_guam.gtx,g2012a_hawaii.gtx,g2012a_puertorico.gtx,g2012a_samoa.gtx"],AUTHORITY["EPSG","5103"]],UNIT["Foot_US
8006096012192],AXIS["Up",UP],AUTHORITY["EPSG","5703"]]]
the header is followed by 2 user-defined bytes
LASzip compression (version 3.4r1 c3 50000): POINT14 3
reporting minimum and maximum for all LAS point record entries ...
X -8890694 -8814297
Y 3282080 3350918
Z -8561 10445
intensity 1 3813
return_number 1 6
number_of_returns 1 6
edge_of_flight_line 0 0
scan_direction_flag 0 0
classification 1 18
scan_angle_rank -31 15
user_data 0 0
point_source_ID 2 3
gps_time 166990440.324050 166990626.865244
extended_return_number 1 6
extended_number_of_returns 1 6
extended_classification 1 18
extended_scan_angle -5167 2500
extended_scanner_channel 0 0
number of first returns: 6004909
number of intermediate returns: 167133
number of last returns: 6004242
number of single returns: 5025048
overview over extended number of returns of given pulse: 5025048 1653117 418470 51301 3198 102 0 0 0 0 0 0 0 0 0
histogram of classification of points:
5337772 unclassified (1)
1794636 ground (2)
225 noise (7)
11745 water (9)
3255 rail (10)
3234 bridge deck (17)
369 Reserved for ASPRS Definition (18)
+-> flagged as withheld: 976791
+---> 976791 of those are unclassified (1)
+-> flagged as extended overlap: 912483
+---> 651644 of those are unclassified (1)
+---> 259801 of those are ground (2)
+---> 19 of those are noise (7)
+---> 491 of those are water (9)
+---> 289 of those are rail (10)
+---> 233 of those are bridge deck (17)
+---> 6 of those are Reserved for ASPRS Definition (18)
To view this discussion on the web visit https://groups.google.com/d/msgid/lastools/BN6PR05MB3668A47631F37130C3BD3F66B8B69%40BN6PR05MB3668.namprd05.prod.outlook.com.
Daniel Gann
Feb 1, 2021, 9:19:20 AM2/1/21
to last...@googlegroups.com
Hi Kirk and Martin,
Thanks for the quick confirmation that it should work. I will try again on another computer then.
Daniel
---
Daniel Gann
Assistant Professor
Assistant Professor
Department of Biological Sciences
Florida International University
Miami, FL 33199
phone: 305-348-1971
From: 'Kirk Waters - NOAA Federal' via LAStools - efficient tools for LiDAR processing <last...@googlegroups.com>
Sent: Monday, February 1, 2021 8:25 AM
Sent: Monday, February 1, 2021 8:25 AM
To view this discussion on the web visit
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Daniel Gann
Feb 1, 2021, 10:46:15 AM2/1/21
to last...@googlegroups.com
Mystery solved. In short, the bulk downloader corrupted (all 49 files) which prompted the laszip command to tell me to contact you. I have to look into the downloader now and figure out why all files were corrupted on download. Thanks for the fast responses.
Have a pleasant day everyone.
Daniel
From: last...@googlegroups.com <last...@googlegroups.com> on behalf of Daniel Gann <ga...@fiu.edu>
Sent: Monday, February 1, 2021 8:44 AM
To: last...@googlegroups.com <last...@googlegroups.com>
Sent: Monday, February 1, 2021 8:44 AM
To: last...@googlegroups.com <last...@googlegroups.com>
To view this discussion on the web visit
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Martin Isenburg
Feb 1, 2021, 11:07:56 AM2/1/21
to LAStools - efficient command line tools for LIDAR processing
Hello Daniel,
Can you send me one of those corrupt files? I would like to see how I can update the error message to avoid this "old compressor confusion" in the future.
Regards,
Martin
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Martin Isenburg
Feb 2, 2021, 7:41:26 AM2/2/21
to LAStools - efficient tools for LiDAR processing
Hello,
the ERROR message was fixed, In the next version of LAStools it will say:
E:\software\LAStools\bin> laszip -i 20161229_FL_PalmBeachCo_2016_807500_742500.laz -check
E:\software\LAStools\bin> laszip -i 20161229_FL_PalmBeachCo_2016_807500_742500.laz -check
WARNING: only 5876 bytes until point block when trying to read 28524 bytes into header.vlrs[1].data
WARNING: only 0 bytes until point block after reading 2 of 4 vlrs. skipping remaining vlrs ...
ERROR: your LAZ file has corruptions in the LAS header resulting in
ERROR: the laszip VLR being lost. maybe your download failed?
ERROR: cannot open lasreaderlas with file name '20161229_FL_PalmBeachCo_2016_807500_742500.laz'
ERROR: could not open lasreader
Regards,
Martin
Daniel Gann
Feb 2, 2021, 9:08:31 PM2/2/21
to last...@googlegroups.com
Thank you for the update - I was able to process all tiles without any errors after re-downloading. The new error message will be very useful for those corrupted file encounters.
Daniel
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