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

[Bernd Vogelgesang]

Hi Magnus,

why not pdal? Cause so far I had no clue about it. And after a short
look at the link, I still have none ;) But its a start.

Thanx,

Bernd

On 26.03.21 10:23, Karl Magnus Jönsson wrote:
> Hi!
> Lots of suggestions here. But if I understand you correct it is lidar data and all about photogrammetry is not in question. Why not pdal? Open source, powerful and what QGIS is using in 3.18.
>
> https://pdal.io/
>
> Karl-Magnus
>
>
> -----Ursprungligt meddelande-----
> Från: Qgis-user <qgis-user-bounces at lists.osgeo.org> För Bernd Vogelgesang
> Skickat: den 26 mars 2021 09:35
> Till: Benoit de Cabissole <benoit at geoproc.com>; qgis-user <qgis-user at lists.osgeo.org>
> Ämne: Re: [Qgis-user] First steps with 3D Scan Data?
>
> Hi Benoit,
>
> ok, thanks. las then.
>
> But when I read about the lastools plugin, the description says that I need to install the lastools software, and the website there tells me that the license is about 1500€ which is a little too much for some learning efforts.
>
> Any other options?
>
> Cheers,
>
> Bernd
>
>
> On 26.03.21 09:28, Benoit de Cabissole wrote:
>> Hi Bernd,
>>
>> OK, that more info!
>>
>> The files are likely to be in Timble RealWorks format.
>> So you will have to get your contractor to provide you with .las
>> files, otherwise your stuck buying RealWorks!
>> Or, perhaps, the viewer is able to export in .las??
>>
>> When you get las files, you can use lastools plugin for QGIS to
>> process them.
>>
>> Cheers,
>> Benoit
>>
>>
>> On 26/03/2021 10:01, Bernd Vogelgesang wrote:
>>> 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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