<HTML dir=ltr><HEAD><TITLE>EXTERNAL:Re: [Liblas-devel] Need a very large LAS file</TITLE>
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<DIV dir=ltr><FONT color=#000000 size=2 face=Arial>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.</FONT></DIV>
<DIV dir=ltr><FONT size=2 face=Arial>That would be enlightening. I would guess a 32-bit overflow is occurring.</FONT></DIV>
<DIV dir=ltr><FONT size=2 face=Arial>So start, perhaps, at 2GB and keep doubling.</FONT></DIV>
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<DIV><FONT color=#000000 size=2 face=Arial>Michael D. Black</FONT></DIV>
<DIV><FONT size=2 face=Arial>Senior Scientist</FONT></DIV>
<DIV><FONT size=2 face=Arial>Advanced Analytics Directorate</FONT></DIV>
<DIV><FONT size=2 face=Arial>Northrop Grumman Information Systems</FONT></DIV>
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<FONT size=2 face=Tahoma><B>From:</B> liblas-devel-bounces@lists.osgeo.org on behalf of Gary Huber<BR><B>Sent:</B> Wed 10/27/2010 5:29 PM<BR><B>To:</B> liblas-devel@lists.osgeo.org<BR><B>Subject:</B> EXTERNAL:Re: [Liblas-devel] Need a very large LAS file<BR></FONT><BR></DIV>
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<P><FONT size=2>Hi Matt,<BR><BR>I've been using an 18 GB LAS file that I generated using a trial license of<BR>Safe Software's FME Desktop. I imagine you'd be able to do the same easier<BR>than I could send you the file. I do get an error in libLAS's cached reader<BR>system when reading points from that huge file the second time. Somehow it<BR>seems the istream becomes invalid. I haven't been able to figure out why. It<BR>reads fine the first time and then part way through the second time when I<BR>am seeking specific points and then reading a sequence of points that<BR>follow. The process works fine on smaller files of only a milllion or so<BR>points.<BR><BR>-Gary<BR>--<BR>View this message in context: <A href="http://liblas-developers.431198.n3.nabble.com/Liblas-devel-Need-a-very-large-LAS-file-tp1780142p1783187.html">http://liblas-developers.431198.n3.nabble.com/Liblas-devel-Need-a-very-large-LAS-file-tp1780142p1783187.html</A><BR>Sent from the libLAS Developers mailing list archive at Nabble.com.<BR>_______________________________________________<BR>Liblas-devel mailing list<BR>Liblas-devel@lists.osgeo.org<BR><A href="http://lists.osgeo.org/mailman/listinfo/liblas-devel">http://lists.osgeo.org/mailman/listinfo/liblas-devel</A><BR></FONT></P></DIV></BODY></HTML>