Data-driven symbol rotation and color

[Nikolai Lebedev]

Hi group!

My goal is to render wind arrows like that:
http://db.tt/m7sMSOjf
I'm now doing it with SLD, but I'd like to do it in mapnik further
(and use a native carto css parser when it comes up).

So in sld it's a pointsymbolizer with a truetype symbol, that's
rotation is calculated depending on one data field, and color is set
in another. The lenght of the arrow tail (the ttf symbol itself) is
chosen also upon a data field.

From what I've found is https://github.com/mapnik/mapnik/wiki/GlyphSymbolizer
should be the somewhat close.
But it has a broken link:
https://github.com/mapnik/mapnik/blob/master/tests/python_tests/glyph_symbolizer_test.py
And seems to be deprecated.

What is the right way to do this data-driven rendering?

[Artem Pavlenko]

Have you tried 'markers' ? (
https://github.com/mapnik/mapnik/wiki/MarkersSymbolizer )

Artem

[Nikolai Lebedev]

Artem, privet!

Looking at MarkerSymbolizer spec. How is it possible to put in the
field value in "rotation" property of svg transform parameter?

On 14 июн, 12:44, Artem Pavlenko <ar...@mapnik.org> wrote:
> Have you tried 'markers' ?  (https://github.com/mapnik/mapnik/wiki/MarkersSymbolizer)
>
> Artem
>

> On 14 June 2012 08:48, Nikolai Lebedev <nlebe...@gispro.ru> wrote:
>
>
>
>
>
>
>
> > Hi group!
>
> > My goal is to render wind arrows like that:
> >http://db.tt/m7sMSOjf
> > I'm now doing it with SLD, but I'd like to do it in mapnik further
> > (and use a native carto css parser when it comes up).
>
> > So in sld it's a pointsymbolizer with a truetype symbol, that's
> > rotation is calculated depending on one data field, and color is set
> > in another. The lenght of the arrow tail (the ttf symbol itself) is
> > chosen also upon a data field.
>

> > From what I've found ishttps://github.com/mapnik/mapnik/wiki/GlyphSymbolizer

> > should be the somewhat close.
> > But it has a broken link:

> >https://github.com/mapnik/mapnik/blob/master/tests/python_tests/glyph...

[Artem Pavlenko]

Привет!

If you're using latest master, you should be able to :

image-transform="rotate([angle_in_degrees])"

[Sven Geggus]

Artem Pavlenko <ar...@mapnik.org> wrote:

> If you're using latest master, you should be able to :
>
> image-transform="rotate([angle_in_degrees])"

As data driven rendering is IMO the most missing feature of mapnik in comparison
to Mapserver: Will it be possible to have something like this

<LineSymbolizer stroke-linejoin="round" stroke="#8d4346" stroke-width="[width]"/>

for LineSymbolizer in future as well?

Sven

--
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umfasst das Grundrecht auf Gewährleistung der Vertraulichkeit und Integrität
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[Dane Springmeyer]

On Jun 15, 2012, at 9:50 AM, Sven Geggus <li...@fuchsschwanzdomain.de> wrote:

> Artem Pavlenko <ar...@mapnik.org> wrote:
>
>> If you're using latest master, you should be able to :
>>
>> image-transform="rotate([angle_in_degrees])"
>
> As data driven rendering is IMO the most missing feature of mapnik in comparison
> to Mapserver: Will it be possible to have something like this
>
> <LineSymbolizer stroke-linejoin="round" stroke="#8d4346" stroke-width="[width]"/>
>
> for LineSymbolizer in future as well?

Yes, that will be supported in the future.