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

[Bernd Vogelgesang]

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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