[Qgis-user] First steps with 3D Scan Data?

[Jésahel Benoist]

You should make a try with the 3d live scanner Android app by Lubos
Vonasek. It offers live photogrammetry with a simple smartphone (better
with a tof sensor).

I'm looking too for easy solutions to use scans with QGIS.

Regards

Jésahel

Le ven. 26 mars 2021 à 09:02, Bernd Vogelgesang <bernd.vogelgesang at gmx.de>
a écrit :

> Hi Benoit,
>
> as I was not present when the scans were made, I can only assume that
> this was a laser scanner on a tripod.
>
> With the sent data, there is a Trimble Scan Explorer Viewer software
> where I can make a "virtual walk" through the scene, so there have to be
> photos but also laser scan data as I can see from different view modes.
>
> As I said, this is the very first time I get in touch with this stuff,
> and Google was of no big help so far.
>
> Besides of tons of other files, the bigger ones with around 50 to 80 MB
> are .rwcx and .tzf files.
> I hoped that someone would know what these file explicitly hold, and
> what I have to do to get them e.g. into QGIS or other open source software.
>
> Cheers,
>
> Bernd
>
> On 26.03.21 08:40, info wrote:
> > Hi Bernd,
> >
> > Well, could you give more info? E.g. what kind of scan:
> > laser/lidar/photo/other? This will influence your workflow.
> >
> > +/-Open source laser/lidar could be based on lastools [1]
> > Open source photogrammetry could be based on AliceVision meshroom
> > [2,3],  MeshLab [4] and blender [5]
> >
> > In photogrammetry: Agisoft metashape [6] and pix4D [7] as good
> > commercial products.
> >
> > BTW: 32 scans, if photos, is quite a very low number of photos for
> > reconstructing a 3D scene!
> >
> > Hope this helps.
> > Cheers,
> > Benoit de Cabissole
> >
> > [1] http://lastools.org/
> > [2] https://alicevision.org/#photogrammetry
> > [3] https://github.com/alicevision/meshroom
> > [4] https://www.meshlab.net/
> > [5] https://www.blender.org/
> > [6] https://www.agisoft.com/
> > [7] https://www.pix4d.com/
> >
> >
> >
> > On 25/03/2021 23:07, Bernd Vogelgesang wrote:
> >> Hi folks,
> >>
> >> in a project on a former dumpside now to be transformed into a sand
> >> lizard habitat, I saw the chance to get my hands dirty for the first
> >> time on 3D scan data (terrestrial). I received 10GB of stuff, and now
> >> I'm completely lost.
> >>
> >> The data consists of .rwcx files, .tzf files and lots of other stuff.
> >>
> >> Is there any chance that I can process any of this data with an open
> >> source stack?
> >> Or what should be done, to make them digestible?
> >>
> >> Second step: There seem to be 32 different scans of the area form all
> >> angles. In case I succeed to somehow load the data, how do I combine
> >> them ?
> >>
> >> For the first steps, I actually "only" would like to generate a decent
> >> DEM from the data to be able to place some features on a map for the
> >> guys in charge to do the habitat stuff.
> >>
> >> Any kind of hints or links to reads about this topic would be
> >> appreciated
> >>
> >> Cheers,
> >>
> >> Bernd
> >>
> >>
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