[Qgis-community-team] raster layer and vector layer ---> create 3D view from it

[Saber Razmjooei]

Hi Larissa,

hmmm, the SRTM is not going to give a proper indication of elevation when
used in conjunction with buildings. The SRTM is very coarse dataset and it
will probably be flat for your extent. Have you considered having seperate
sections for 3d data visualisations, each with its own dataset. One section
could be vectors (there is quite a bit to cover there: points as 3d models,
3d lines and buildings), rasters (to cover terrain and probably mesh) and
another for creating animations and fly-overs.

I am available most of next week. Feel free to drop me an email
off-the-list and happy to show you in a webconferencing session how to use
those features.

Many thanks,
Saber


On Thu, 13 Feb 2020 at 13:30, Larissa Junek <l.junek at gmx.net> wrote:

> Hello Saber,
> in the meantime I used New York 3D data to check out the 3D view tool.
> Using the hints of your blog I'm having
>
>    - a Buildings_3D_Multipatch layer from a
>    DA10_3D_Buildings_Multipatch.gdb (vector layer)
>    - SRTM data N40W074.hgt (raster layer)
>
> now.
>
> Next steps:
>
>    - the srtm data in the 3D view tool: Type = DEM (raster layer) ,
>    Elevation = N40W074
>    - single symbol setting in the 3D view properties of
>    Buildings_3D_Multipatch
>
> Using SRTM data this way doesn't help to depict the vectors in 3D (I
> thought the srtm data have the function of a master). Do I have to convert
> file formats?
> I'm using QGIS 3.10.2 and win10.
>
> Cheers, Larissa
>
>
> -------- Weitergeleitete Nachricht --------
> Betreff: Re: [Qgis-community-team] 3D view of LIDAR data city of boulder
> Datum: Tue, 11 Feb 2020 17:22:32 +0100
> Von: Larissa Junek <l.junek at gmx.net> <l.junek at gmx.net>
> An: Saber Razmjooei <saber.razmjooei at lutraconsulting.co.uk>
> <saber.razmjooei at lutraconsulting.co.uk>,
> qgis-community-team at lists.osgeo.org
>
> Hi Saber,
>
> ok will the clipped Boulder data be suitable for the 3D dataset that we
> want to provide in the qgis sample data?
>
> I wonder if srtm data will have a good resolution. Will you also clip a
> srtm dataset for usage in the qgis sample data?
>
> Then I would of course prefer to use this data so that a user can quickly
> check out the usage of the 3D view functionalities!
>
> Cheers, Larissa (-:
> Am 10.02.2020 um 16:55 schrieb Saber Razmjooei:
>
> Hi Larissa,
>
> I was clipping the Boulder data to something manageable. But if you have
> moved to NY data, that should be fine too.
>
> In terms of the underlying terrain, we have a separate blog post.
>
> https://www.lutraconsulting.co.uk/blog/2018/03/01/working-with-qgis-3d-part-1/
>
> Usually the z-scales in terrain and buildings do not line up nicely,
> therefore I thought it is better to have 2 different sections: one on
> terrain (rasters) and one on buildings (vector).
>
> Let me know if you have any questions.
>
> Kind regards
> Saber
>
> On Mon, 10 Feb 2020 at 15:38, Larissa Junek <l.junek at gmx.net> wrote:
>
>> Hi Saber,
>>
>> I switched the location and prepared a geopackage with the 3D data of new
>> york.
>>
>> I think your blog should be updated as I still only can depict a flat
>> plane of the data in the 3d view tool.
>>
>> Sorry for bothering but it's my task to write about the 3D settings in
>> QGIS 3.10 ...
>>
>> Cheers, Larissa
>> Am 10.02.2020 um 15:17 schrieb Larissa Junek:
>>
>> Hi Saber,
>>
>> thanks for giving me the hint. Do I need to add a raster layer with
>> height information like geoTiff (SRTM data etc.)
>>
>> in order to define the position of the 3D buildings ? I got this
>> information in a presentation on youtube. Right now, after
>>
>> defining the single symbol of walls and roofs (data city of Boulder),
>> there is only a plane :-(
>>
>> Cheers Larissa
>> Am 08.02.2020 um 13:38 schrieb Saber Razmjooei:
>>
>> Hi Larissa,
>>
>> Apologies. Boulder data indeed contain walls and roofs.
>>
>> To view the data in 3D, you need to go to each layer and open
>> Properties > 3D view and change the style to Single symbol.
>>
>> Also, the dataset is very large. It would be easier if you crop the data
>> to a smaller area.
>>
>> Regards
>> Saber
>>
>>
>> On Sat, 8 Feb 2020 at 12:00, Saber Razmjooei <
>> saber.razmjooei at lutraconsulting.co.uk> wrote:
>>
>>> Hi Larissa,
>>>
>>> Many thanks for looking into documenting this.
>>>
>>> I had a quick look at the data. It is only the footprint. So, you can
>>> only extrude the data (based on height).
>>>
>>> There is a good data source of 3D buildings here:
>>> https://github.com/wonder-sk/3d-spatial-data
>>>
>>> And for building in New York, we wrote a blog post here. The data have
>>> z-valuse and should automatically get picked up by the 3D map view.
>>> https://www.lutraconsulting.co.uk/blog/2017/10/16/buildings-in-qgis3d/
>>>
>>> Feel free to use any of the content from our website in the
>>> documentation.
>>>
>>> Kind regards
>>> Saber
>>>
>>> On Fri, 7 Feb 2020 at 13:59, Larissa Junek <l.junek at gmx.net> wrote:
>>>
>>>> Hello folks,
>>>>
>>>> for documentation purposes I'd like to visualize the 3d data of the city
>>>> of boulder in qgis 3.10 .
>>>>
>>>> https://bouldercolorado.gov/open-data/city-of-boulder-3d-buildings/
>>>>
>>>> Unfortunately qgis crashes when loading the shapefile into the 3d view.
>>>>
>>>> Also, where do I have access to the z-coordinate so that there will be a
>>>> 3d view. At the moment there is only visible a plane with the vectors
>>>> but no "z-value"  in the 3d view application. Extrusion doesn't help
>>>> solute the problem.
>>>>
>>>> There is a hint that these data have something to do with GeoJSon, so
>>>> maybe I have to find another 3d data suitable for using in the 3D view
>>>> application.
>>>>
>>>> Can somebody help?
>>>>
>>>> Cheers, Larissa
>>>>
>>>> _______________________________________________
>>>> Qgis-community-team mailing list for organizing community resources
>>>> such as documentation, translation etc..
>>>> Qgis-community-team at lists.osgeo.org
>>>> https://lists.osgeo.org/mailman/listinfo/qgis-community-team
>>>
>>>
>>>
>>> --
>>> Saber Razmjooei
>>> www.lutraconsulting.co.uk
>>> +44 (0)7568 129733
>>>
>>
>>
>> --
>> Saber Razmjooei
>> www.lutraconsulting.co.uk
>> +44 (0)7568 129733
>>
>>
>
> --
> Saber Razmjooei
> www.lutraconsulting.co.uk
> +44 (0)7568 129733
>
>

-- 
Saber Razmjooei
www.lutraconsulting.co.uk
+44 (0)7568 129733
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