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

[Kirk Schmidt]

Hi Bernd:

Just a clarification on LAStools.  The library has open as well as 
licensed algorithms. Typically, the basic functionality is available for 
free and implemented in QGIS.  The advanced tools are available through 
licensing.  Rapidlasso GmbH also developed the laz format which is an 
efficient compression standard to make large datasets/point clouds more 
manageable.

PDAL and R can be used to process the data but if your data is 
compressed, you would have to use  the unlicensed Laszip routine 
available in QGIS 3.x to convert the data to an uncompressed las format.

Kirk





On 3/26/2021 6:23 AM, 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
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Qgis-user mailing list
>>>>> Qgis-user at lists.osgeo.org
>>>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: kirk at nortekresources.com
Web: www.nortekresources.com