[gdal-dev] LAS support

[Giuseppe Amatulli]

Hi,
just to let you know that pktools (
http://www.nongnu.org/pktools/html/index.html) in particular
pklas2img support the las file to create dem.
Best
-- 
Giuseppe Amatulli, Ph.D.

Center for Earth Observation
ESC Room 119A
Yale University
P.O. Box 208109
New Haven, CT, 06520-8109
Teaching: spatial-ecology.net
Work:  http://sbsc.yale.edu/training-and-support


On 29 November 2013 15:53, Mateusz Loskot <mateusz at loskot.net> wrote:

> On 29 November 2013 18:39, Even Rouault <even.rouault at mines-paris.org>
> wrote:
> > Le vendredi 29 novembre 2013 18:35:28, Rui L. Pires a écrit :
> >> On 29 November 2013 11:44, Mateusz Loskot <mateusz at loskot.net> wrote:
> >> > On 29 November 2013 10:32, Rui L. Pires <rlpires at gmail.com> wrote:
> >> > > I was approaching this issue and particularly OGR as a solution for
> >> > > data conversion and reduction. I am quite fond of the functionality
> >> > > OGRLayer makes possible in a transparent way, such as reprojection
> and
> >> > > spatial querying.
> >> >
> >> > Those are valid use cases of course and I don't argue here.
> >> > Just, since OGR is an abstraction layer and point clouds are enormous,
> >> > I wouldn't expect high performance.
> >> > That's why, IMHO, point clouds require dedicated toolkits (PDAL, PCL).
> >>
> >> Hi Mateusz,
> >>
> >> I understand your point regarding performance but I consider that to be
> a
> >> driver issue. My point is functionality before speed.
> >>
> >> Perhaps, you can try las2ogr to see how OGR in general will work for
> your
> >>
> >> > uses.
> >> > Besides, writing OGR driver with libLAS (or PDAL) should be feasible.
> >>
> >> Indeed it is feasible. It's running fine here! ;-)
> >
> > I'm not versed in lidar or point clouds to know if it is really
> relevant, but
> > it is true that OGR has drivers for stuff that aren't strictly vector
> formats.
> > And as las2ogr exists, I also imagine that an OGR driver should be
> doable.
> > So it would not be completely out of topic to have a OGR driver based on
> > libLAS or PDAL
>
> Sure. As I've said, I somewhat changed my opinion on that lately :-)
>
> > (the question is : should it be based on libLAS or PDAL ? Any
> > opinion on this ?)
>
> AFAICT, it should be PDAL as libLAS is considered as deprecated
> and not actively maintained. But, I'll leave this to Hobu to confirm.
>
> > A potential problem is that libLAS and PDAL have GDAL as a build
> dependency,
> > so a OGR driver would need to be compiled as a plugin (same as GRASS
> plugin
> > for example).
>
> That's right.
>
> Best regards,
> --
> Mateusz  Łoskot, http://mateusz.loskot.net
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