[Qgis-developer] Lidar data into QGIS

[Larry Shaffer]

Hi Paolo,


On Tue, Jan 28, 2014 at 12:13 PM, Paolo Cavallini <cavallini at faunalia.it>wrote:

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> Hi all.
> Lidar data in LAS format are increasingly widespread. Leaving aside all 3D
> frenzy, we
> would be interested in simply displaying them in QGIS, with their useful
> attributes
> (classification and intensity), either with a native driver or through an
> available
> library. All the licensing issues around libLAS/LSTools are a bit obscure
> to me, so I
> wonder if someone has already dealt with this.
> Any hint would be appreciated.
>

Have you looked into PDAL [0][1]? It is already in OSGeo4W 32-bit, though
apparently not in 64-bit yet [2][3]. On the Mac side, it is already
available in the Homebrew package manager [4]. It appears to be BSD
3-Clause licensed.

Not entirely sure of its full API, but seems to be an ideal candidate for a
Processing provider, yes?

While I am not a Lidar guru by any means, it looks like the JSON output
from PDAL [5] is also an input for three.js [6], e.g. Qgis2threejs PyQGIS
plugin. So that is fairly interesting... may be possible to load in a
clipped .las file and visualize your map canvas on it? That would be very
cool.

[0] http://www.pdal.io/
[1] https://github.com/PDAL/PDAL/

[2] http://osdir.com/ml/osgeo4w-development/2013-06/msg00005.html
[3] http://download.osgeo.org/osgeo4w/versions_diff-x86-x86_64.html
[4] https://github.com/Homebrew/homebrew/blob/master/Library/Formula/pdal.rb

[5] http://www.pdal.io/tutorial/reading.html#javascript-output
[6] http://threejs.org/docs/#Reference/Loaders/GeometryLoader,
     http://threejs.org/docs/#Reference/Loaders/JSONLoader

Regards,

Larry


> Thanks in advance.
> All the best.
> - --
> Paolo Cavallini - www.faunalia.eu
> Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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