Blast2demPro error

[Martha Bostwick]

New to LAStools, and trying to understand this error I get when processing 4 LAZ files with  blast2dempro. I'm running this through an ArcGIS Pro 10.8 toolbox. It says Successful Completion of tool, but I have no resulting TIF images at the end, and there are a number of errors reported. 

Any help greatly appreciated.

Start Time: January 22, 2021 10:54:03 AM

Starting blast2dem production ...Found C:\LAStools\bin ...Found C:\LAStools\bin\blast2dem.exe ...LAStools command line:"C:\LAStools\bin\blast2dem.exe" -i "C:\LAStools\Sample_LiDAR_Data\laz\*.laz" -keep_class 2 -otif -odir "C:\LAStools\Sample_LiDAR_Data\images"EPSG code 1127 not found in 'vertcs.csv' file set_VerticalCSTypeGeoKey: look-up for 1127 not implemented ERROR: unknown vertical EPSG code in '-vertical_epsg 1127'. tin2dem usage error. contact 'mar...@rapidlasso.com' EPSG code 1127 not found in 'vertcs.csv' file set_VerticalCSTypeGeoKey: look-up for 1127 not implemented ERROR: unknown vertical EPSG code in '-vertical_epsg 1127'. tin2dem usage error. contact 'mar...@rapidlasso.com' EPSG code 1127 not found in 'vertcs.csv' file set_VerticalCSTypeGeoKey: look-up for 1127 not implemented ERROR: unknown vertical EPSG code in '-vertical_epsg 1127'. tin2dem usage error. contact 'mar...@rapidlasso.com' EPSG code 1127 not found in 'vertcs.csv' file set_VerticalCSTypeGeoKey: look-up for 1127 not implemented ERROR: unknown vertical EPSG code in '-vertical_epsg 1127'. tin2dem usage error. contact 'mar...@rapidlasso.com' duplicate_points 1 Please note that LAStools is not "free" (see http://lastools.org/LICENSE.txt) contact 'martin....@rapidlasso.com' to clarify licensing terms if needed.Success. blast2dem done.

Succeeded at January 22, 2021 10:55:25 AM (Elapsed Time: 1 minutes 22 seconds)

[jeansebasti...@gmail.com]

Hi Martha,
We have a similar issue using blast2dem. We are getting the following error:

set_VerticalCSTypeGeoKey: look-up for 1127 not implemented
ERROR: unknown vertical EPSG code in '-vertical_epsg 1127'.
tin2dem usage error.

Did you find a workaround?

[Jochen Rapidlasso]

Hi Jean-Sebastien,

what does 

    lasinfo64 -i "<your_input_file.laz>"

say about your input file?

Who does your command you try to run look like?

If you want you can provide a link to your file and we will have a look.

Thanks,

Jochen @rapidlasso

[Jochen Rapidlasso]

Hi Jean-Sebastien,
there was no change in the vertcs.csv according to EPSG 1127.
The EPSG 1127 was hard coded within LAStools.
According to this blog post the code for
    Canadian Geodetic Vertical Datum of 2013
was changed from 1127 to 6647.
Please see 
    https://epsg.org/search/by-name/?query=1127

and

    https://epsg.org/crs_6647/CGVD2013-CGG2013-height.html

for details.

Probably you can solve the problem by avoid using
    blast2dem -i lake.laz -otif -o tmp.laz -vertical_epsg 1127
and using
    blast2dem -i lake.laz -otif -o tmp.laz -vertical_epsg 6647
instead.

Cheers,

Jochen @rapidlasso

[Jochen Rapidlasso]

Hi Jean-Sebastien,

one more note about this:

For tools not supporting -vertial_epsg .... you can add this line to the .\lastools\bin\serf\geo\vertcs.csv file:

1127,CGVD2013 height,1127,Canadian Geodetic Vertical Datum of 2013,9001,1,0,6499,,

Best,

Jochen @rapidlasso

[jeansebasti...@gmail.com]

We were not able to make it work. I posted a workaround here: https://github.com/LAStools/LAStools/issues/209