Re: [Qgis-user] Canvas larger than viewport is rendered/drawn for vector layers, but not for raster layers

[Nyall Dawson via QGIS-User]

On Thu, 16 Nov 2023, 2:40 am Thomas Larsen Wessel via QGIS-User, <
qgis-user@lists.osgeo.org> wrote:

> This screen capture demonstrates much better than words:
> https://imgur.com/5LSEsiY.
>
> Is there any way I can make it prerender the raster data as well?
>
> What I have already tried:
> * setting almost infinite cache size
> * all the relevant QGIS options/settings I could find
> * both local (gpkg) and remote WMS raster data
> * both Windows and Linux
> * QGIS 3.22 and 3.30
> * different CRS for layer
>
> Some of my tests did make the rendering speed up, but no matter what it
> always renders the raster data only for the canvas inside the view port,
> and does not render anything outside of the view port, whereas vector data
> is always rendered for an area that extends outside the view port.
>

There's a few parts to the logic defining whether a layer will be included
in the outside-visible-extent preview:

- WMS layers are **never** included. This is by design, to reduce
unnecessary server load
- when a layer is drawn the time taken to render it is recorded. If this
time exceeds a certain threshold, then the layer is marked as too expensive
to render in these optional out-of-canvas areas.

(You can check the new renderer profile option available in the F12
debugging tools panel in 3.34 for more detailed information about layer
render times)

Nyall



> Sincerely, Thomas
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[Qgis-user] What is the r coordinate?

[Alister Hood via QGIS-User]

The vertex editor panel always seems to include a column for an r
coordinate.  It always seems to be empty and anything I try to type in it
is thrown away.
What is it?  I guess I haven't been looking carefully enough, but I can't
seem to find it explained anywhere.

You can see a screenshot in the docs at:
https://docs.qgis.org/3.34/en/docs/training_manual/create_vector_data/create_new_vector.html?highlight=vertex%20editor#moderate-fa-using-vertex-editor-table

Thanks.
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Re: [Qgis-user] What is the r coordinate?

[Emma Hain via QGIS-User]

Hi Alister
The 'r' coordinate is for the radius
https://docs.qgis.org/3.28/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html?highlight=vertex%20editor#the-vertex-editor-panel

Cheers
Em

On Tue, 12 Dec 2023 at 09:22, Alister Hood via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> The vertex editor panel always seems to include a column for an r
> coordinate.  It always seems to be empty and anything I try to type in it
> is thrown away.
> What is it?  I guess I haven't been looking carefully enough, but I can't
> seem to find it explained anywhere.
>
> You can see a screenshot in the docs at:
>
> https://docs.qgis.org/3.34/en/docs/training_manual/create_vector_data/create_new_vector.html?highlight=vertex%20editor#moderate-fa-using-vertex-editor-table
>
> Thanks.
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-- 
Emma Hain — Product Manager/Senior GIS Analyst
e...@north-road.com / 0414 512 782
[image: https://north-road.com]
*North Road*
Cartography • Development • Spatial Analysis
--
*north-road.com* 



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Re: [Qgis-user] What is the r coordinate?

[Alister Hood via QGIS-User]

Thanks, I should have found that, but was tripped up by
https://github.com/qgis/QGIS-Website/issues/961 and not reading carefully
enough.

I wondered if it was a radius, but I thought if so I would be able to type
a radius in to turn a vertex into a curve - I was mainly confused
because digitising curves doesn't work here for CompoundCurve and
MultiCurve memory layers (they are digitised as if the provider doesn't
support curves; maybe I have a plugin that is causing this problem).
Now that I've tried a CurvePolygon layer it all becomes clear.  And I see
that to convert between a vertex and a curve you select it with the node
tool and press 'o'.

Thanks.

On Tue, 12 Dec 2023 at 12:56, Emma Hain  wrote:

> Hi Alister
> The 'r' coordinate is for the radius
>
> https://docs.qgis.org/3.28/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html?highlight=vertex%20editor#the-vertex-editor-panel
>
> Cheers
> Em
>
> On Tue, 12 Dec 2023 at 09:22, Alister Hood via QGIS-User <
> qgis-user@lists.osgeo.org> wrote:
>
>> The vertex editor panel always seems to include a column for an r
>> coordinate.  It always seems to be empty and anything I try to type in it
>> is thrown away.
>> What is it?  I guess I haven't been looking carefully enough, but I can't
>> seem to find it explained anywhere.
>>
>> You can see a screenshot in the docs at:
>>
>> https://docs.qgis.org/3.34/en/docs/training_manual/create_vector_data/create_new_vector.html?highlight=vertex%20editor#moderate-fa-using-vertex-editor-table
>>
>> Thanks.
>> ___
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>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
> --
> Emma Hain — Product Manager/Senior GIS Analyst
> e...@north-road.com / 0414 512 782
> [image: https://north-road.com]
> *North Road*
> Cartography • Development • Spatial Analysis
> --
> *north-road.com* 
> 
> 
> 
>
>
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