[Liblas-devel] Need a very large LAS file

[Black, Michael (IS)]

Gary -- can you try using las2las to cut out smaller sections of your file until the problem goes away and find the "magic" point at which it fails?  Actually, I wonder if las2las will even work on a file that large.
That would be enlightening.  I would guess a 32-bit overflow is occurring.
So start, perhaps, at 2GB and keep doubling.
 
Michael D. Black
Senior Scientist
Advanced Analytics Directorate
Northrop Grumman Information Systems
 

________________________________

From: liblas-devel-bounces at lists.osgeo.org on behalf of Gary Huber
Sent: Wed 10/27/2010 5:29 PM
To: liblas-devel at lists.osgeo.org
Subject: EXTERNAL:Re: [Liblas-devel] Need a very large LAS file




Hi Matt,

I've been using an 18 GB LAS file that I generated using a trial license of
Safe Software's FME Desktop. I imagine you'd be able to do the same easier
than I could send you the file. I do get an error in libLAS's cached reader
system when reading points from that huge file the second time. Somehow it
seems the istream becomes invalid. I haven't been able to figure out why. It
reads fine the first time and then part way through the second time when I
am seeking specific points and then reading a sequence of points that
follow. The process works fine on smaller files of only a milllion or so
points.

-Gary
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