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 <mate...@loskot.net> wrote: > On 29 November 2013 18:39, Even Rouault <even.roua...@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 <mate...@loskot.net> wrote: > >> > On 29 November 2013 10:32, Rui L. Pires <rlpi...@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 > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev >
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