[GRASS-dev] r.in.lidar: read multiple LAS files in one run

[Newcomb, Doug]

Vaclav,

I have successfully  processed  a county with 966 laz files with well over
4.2 billion points, using a base elevation raster with 2.4 billion pixels (
Hyde county, NC  5 ft resolution DEM , about half water).  It is a bit
slower, but it does solve several of my issues.  Well done!

Will this be backported to 7.0 ?  :-)

Doug

On Mon, Oct 26, 2015 at 3:00 PM, Vaclav Petras <wenzeslaus at gmail.com> wrote:

>
> On Mon, Oct 26, 2015 at 1:20 PM, Newcomb, Doug <doug_newcomb at fws.gov>
> wrote:
>
>> multiple files at the 4.2 point las 1.2 limit! I can live with slow, just
>> concerned about the memory demands working with larger areas.
>
>
> The processing goes by row chunks. By default everything is in the memory.
> You can say that only half of rows will be in the memory at a time by
> percent=50 (you have to guess how much memory it will take). It will be
> (much) slower because it will iterate over the files (twice in this case).
> I was not able to do any tests with large amounts of points but the only
> problem will be capacity of some counters for percentage and report. The
> actual processing takes one point at a time, so there shouldn't be any
> limit. This is by the way still the same as before, I haven't changed
> anything in the way how this is handled. Let me know if this doesn't
> address your concerns.
>



-- 
Doug Newcomb
USFWS
Raleigh, NC
919-856-4520 ext. 14 doug_newcomb at fws.gov
---------------------------------------------------------------------------------------------------------
The opinions I express are my own and are not representative of the
official policy of the U.S.Fish and Wildlife Service or Dept. of the
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As a federal employee, my email may be subject to FOIA request.
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