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

[Bernd Vogelgesang]

Hi Richard,

wow, this is amazing stuff in the video!

For the type of things I am doing, this solution would be quit sufficient.
I think the data I received is way too detailed, but I'll try to get in
touch and ask them to convert it to .las if possible.

Thanx a lot for all the hints!

Bernd

On 26.03.21 10:38, Richard McDonnell wrote:
> Hi,
> If you are looking for an Opensource  Pointcloud Stack, have a look at this video on youtube by Klas Karlsson
>
> https://www.youtube.com/watch?v=pe04m-gHM-M&t=1180s
>
> To make the above work for you , you would have needed to receive the scan data in LAS format, it would appear that the rcwx files are proprietary format from Trimble, and are Trimble RealWorks Project files. The Pointcloud data is in the .tzf files Can you ask the provider of the data to export the scan data as a LAS Format File? You should then be able absorb the data into an Open Source Stack i.e.....Cloud Compare and QGIS 3.18
>
> Hope that’s of some guidance and help.
> Regards,
>
> Richard.
>
>
>
>
>
>
> ——
> Richard McDonnell MSc GIS, FME Certified Professional
> FRM Data Management
>
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>
> ——
> Richard McDonnell MSc GIS, FME Certified Professional
> FRM Data Management
>
> ——
> Oifig na nOibreacha Poiblí
> Office of Public Works
>
> Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
> ——
> M +353 87 688 5964   T +353 1 647 6543
> https://www.opw.ie
>
> ——
> To send me files larger than 30MB, please use the link below https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie
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> -----Original Message-----
> From: Qgis-user <qgis-user-bounces at lists.osgeo.org> On Behalf Of Bernd Vogelgesang
> Sent: 26 March 2021 08:01
> To: info <info at geoproc.com>; qgis-user <qgis-user at lists.osgeo.org>
> Subject: Re: [Qgis-user] First steps with 3D Scan Data?
>
> 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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