[Liblas-devel] Open source lidar software?

[Mike Grant]

On 06/04/11 18:37, Michael P. Gerlek wrote:
> I'll call your bluff / nag you on the viewer, though -- can you give us any
> details?

We process LIDAR for the NERC ARSF (http://arsf.nerc.ac.uk/) and needed
a way to handle large datasets in Linux (sorry, no Windows port yet),
mostly for profiling and manual classification.  We got a couple of
compsci intern students to write us a viewer, so the code
(C++/Boost/GTK-glade/OpenGL) isn't very pretty and the UI is a bit
quirky, but it's serving our purposes well at the minute.  The code was
originally derived from another GPL image viewer, so it's GPL too.

http://rsg.pml.ac.uk/staff/mggr/lag_screenshot_ethiopia299-crop.jpg
is a screenshot of it viewing ~20GB of data from Ethiopia on a 4GB
machine.  It handles this with a quad tree structure, storing
multi-resolution tiles to local disk.  Obviously it's not fast if you have
to page a lot, but it's not bad especially when zoomed out.  We call
it LAG ;)

I've been meaning to put it up on our website or SF, but haven't got
around to it yet.  Maybe posting about it will help - nagging welcome!

Cheers,

Mike.

P.S. I'm now away until Monday, after stirring up interest ;)


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