[pdal] [EXTERNAL] Re: Migrating from libLAS

[Smith, Michael ERDC-CRREL-NH]

Pdal does have something like lasbuidvrt, it's pdal tindex. I'm working to get Howard and Andrew to support the tindex as a source format.

--
Michael Smith
Remote Sensing GIS Center
US Army Corps of Engineers












From: Newcomb, Doug
Sent: Thursday, September 3, 2015 6:42 PM
To: Vaclav Petras
Cc: pdal
Subject: [EXTERNAL] Re: [pdal] Migrating from libLAS




On Thu, Sep 3, 2015 at 6:22 PM, Vaclav Petras <wenzeslaus at gmail.com<mailto:wenzeslaus at gmail.com>> wrote:

On Thu, Sep 3, 2015 at 5:14 PM, Newcomb, Doug <doug_newcomb at fws.gov<mailto:doug_newcomb at fws.gov>> wrote:
r.in.lidar input=aggregated.las output=skewness_60_ft_5ft_to_canopy_top  z_mode=hag base_dem=aggrgated_dem.vrt zrange=5,250 method=skewness

z_mode would be either height above ground (hag) or datum (height from datum - default)

I'm not sure what is z_mode=datum. Isn't this just subtract value from z (offset)?

Hey, I was trying to be fancy:-) .  Original or absolute would work just as well.




But anyway, speaking just about GRASS GIS, it is surely possible for v.in.lidar (although with significant slow down but trivial implementation). I guess it is possible for r.in.lidar as well. I'm not sure how scalable (in terms of number of points) it would be when using PDAL. It seems that PDAL can limit it when doing processing but apparently there are ways


around it at least for some cases but nothing like lasbuildvrt to paste together several files without actually merging them.

Well, I did say it was a dream world :-)

Doug


--
Doug Newcomb
USFWS
Raleigh, NC
919-856-4520 ext. 14 doug_newcomb at fws.gov<mailto:doug_newcomb at fws.gov>
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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 Interior.   Life is too short for undocumented, proprietary data formats.
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