LASInfo + LASValidate - which LAS File and Point Formats do these commands cover?

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Rose Phillips

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Feb 11, 2019, 9:48:13 PM2/11/19
to The LAS room - a friendly place to discuss the LAS and LAZ formats

Hi all,

 

I was wondering are all the error messages that can be found in lasvalidate reports included in lasinfo reports? That is if I extracted the error messages from the lasinfo report, I would get the same messages in the lasvalidate xml report?

 

Are all the Point Data Records (minimum required specifications per the ASPRS Standards ) covered in lasvalidate / lasinfo for LAS 1.2, 1.3 and 1.4 File Types? I've attached the ASPRS LAS 1.2 Standard as reference.

 

Is there any documentation on this that I might have missed?

 

Many thanks,

Rose

LAS1.2 Reference.pdf

Martin Isenburg

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Feb 11, 2019, 10:04:24 PM2/11/19
to The LAS room - a friendly place to discuss specifications of the LAS format
Hello,

the report produced by lasinfo mainly summarizes the contents of a LAS or LAZ file (and produces a few warnings about "resolution fluff" or poorly chosen "scale factors" and "offsets"). These reports are the minimum what I would like users of LAStools to send me when they encounter issues with their LAS / LAZ files.


the report produced by lasvalidate is much more rigorous and also checks whether all fields are properly populated as one would expect for a LAS or LAZ tile delivered in accordance to the LAS 1.2 though LAS 1.4 specifications. the results of lasvalidate are a "best effort" on my end and is open to community input. Currently there is one contested "fail' having to do with "point source ID" and "file source ID" that is still not settled (as the absence of continued requests / discussion / pressure) makes me push those lesser critical items to the back of my TODO list.


in short. lasinfo does not replace lasvalidate. lasinfo lists what interest me. lasvalidate checks what the specification demands. all point types 0 through 10 are supported. the FWF part of the FWF point types 4, 5, 9, and 10 are not checked as rigorously as there seems to be less content of / demand for this point record type. both are open source products.

Regards,

Martin @rapidlasso

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