Issue loading LiDAR

pokeycruncher
pokeycruncher
in Bug Report
I've been trying to load a large number of LiDar files into GlobalMapper, both .las and .laz, and I've been getting an issue where the LiDAR module is unable to determine the overlay type for the LiDAR files it's trying to load. It then gives me the "select overlay type" box, where I scroll down to the "LIDAR LAS/LAS (ASPRS) Format" option and select it. An error then appears:

"Error loading <file path>\AL_BlountCo_2010_000027.laz
Unable to open file for use with LASzip.
LidarLasOverlay.cpp - 1517
Version: v15.1.6 (64-bit)
Build Time: Feb 25 2014 00:13:57"

I've looked and been unable to find a description of exactly what the error is (and I don't have the source code for it, so I can't check what the line number is indicating). Does anyone know what is going on?

The LiDAR in question is a large group of LiDAR files downloaded from here: https://coast.noaa.gov/inventory/

I can confirm that the many of the files do load and work fine; I am unsure what is causing the error for these ones. Any help is greatly appreciated.

Thanks!

~William

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Answers

  • pbateson
    pbateson

    Hi pokeycruncher, did you ever find a solution to this? I am having the same problem on v26.0

  • bmg_mike
    bmg_mike Global Mapper Guru Moderator, Trusted User

    I have just tried to find the Blount County, AL Lidar file in question, but the USIEI site (https://coast.noaa.gov/inventory) seems to be non-functional at the moment, at least for me. Regardless of where I look no data of any type is available.

    If either of you have a sample file you can post there, I can try loading it and see what is up. The error from Global Mapper 15 indicates that the LAZ format didn't seem valid. Of course, our LAZ reader has been updated a lot since GM v15, so if the issue persists in GM 26.0 it could be that the file itself is the problem.

    Thanks,

    Mike

    Global Mapper Guru

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