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#1 2010-10-12 18:43:17

wyo
Member
From: Thalwil
Registered: 2010-08-04
Posts: 667
Website

How are SVGs rendered when exported?

I've read here http://forum.openstreetmap.org/viewtopic.php?id=9590 that Mapnik and Osmarender can produce SVGs. Looking into the Wiki showed http://wiki.openstreetmap.org/wiki/Svg . How are they rendered? Which language? Where do I find the sources?

Wyo

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#2 2010-10-12 21:02:00

E-Malte
Member
From: Düsseldorf
Registered: 2009-03-06
Posts: 324

Re: How are SVGs rendered when exported?

Mapnik uses Cairo or AGG for rendering (I guess one can choose) [1]. Both are able to handle the same functions with another output (PNG, SVG, PDF, ...)
Osmarender uses XSLT. Therefore the OSM-XML is directly transoformed into an SVG (which ist XML as well). After that Tiles@Home (which produces the osmarender-layer) uses Inkscape [2] for rendering PNG-tiles out of the SVGs.

----
[1] http://trac.mapnik.org/wiki/MapnikRenderers
[2] http://www.inkscape.org
----

Hope this helps,
  Malte

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#3 2010-10-12 21:21:27

wyo
Member
From: Thalwil
Registered: 2010-08-04
Posts: 667
Website

Re: How are SVGs rendered when exported?

E-Malte wrote:

Mapnik ...

Thanks. Therefore not much help for the Html Editor.

Wyo

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#4 2010-10-12 22:14:36

E-Malte
Member
From: Düsseldorf
Registered: 2009-03-06
Posts: 324

Re: How are SVGs rendered when exported?

Probably OpenLayers can help here:
As far as I know a Vector Layer in OpenLayers is embedded SVG as well. It can get its data directly from osm-files, geojson, and a couple of other formats and has options for styling, mouse events and so on.

EDIT: Look at this example: http://openlayers.org/dev/examples/osm-layer.html
it retrieves its data from a (in this case cached) osm-file, and on click it also displays the tags of the element. As the tags are saved in variables it shouldn't be any problem to fill text-input-fields with it.

Malte

Last edited by E-Malte (2010-10-12 22:18:44)

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#5 2010-10-13 16:15:07

stephan75
Member
Registered: 2008-05-28
Posts: 2,918

Re: How are SVGs rendered when exported?

as far as I know, Merkaartor and maposmatic.org also do some rendereing with SVG output ... any hints in their documentation or source code?

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