[mapserver-users] Export SVG
Peter Hopfgartner
peter.hopfgartner at r3-gis.com
Wed Dec 2 05:09:34 EST 2009
Hi Maria,
the fact that a SVG rendered by MapServer is simplified makes sense,
since what MapServer basically gives are maps, not raw data. Imagine
that you want a map of all European countries, where your raw data has
details down to something like a meter, the resulting SVG file would
easily scale up to some GB of data.
I'f you want raw data, try exporting in GML and render it with some
tools like GMLViewer or access MapServer through WFS with some desktop
GIS program.
If I'm right, what FULL_RESOLUTION does is to place the nodes of the
polygon more accurately, but I doubt that it changes the number of nodes.
Peter
Maria Neywell wrote:
>
> Hi,
>
>
>
> Sorry, I don’t think you are getting it right. I’m going to try to
> explain it differently.
>
>
>
> The aliasing in my svg file rendered by mapserver is independent of
> the viewer. Mapserver automatically simplifies geometries during the
> svg generation, so the geometries rendered in a SVG file don’t match
> with the ones in my original map.
>
>
>
> See enclosed a picture to explain my problem. Iit will help you to
> understand and to compare before and after SVG generation.
>
>
>
> Do you understand what's going on with mapserver and so with my svg file ?
>
>
>
> Thanks a lot and I’m sorry if my English is not so good to explain my
> problems
>
>
> Regards,
>
>
> Maria
>
>
>
> 2009/11/26 Yewondwossen Assefa <yassefa at dmsolutions.ca
> <mailto:yassefa at dmsolutions.ca>>
>
> Hi,
>
> Not sure I get it correctly: MapServer exports a vector file (the
> svg), when you mention anti-aliasing, I believe you are referring
> to an svg viewer rendering the svg file? From what I understand,
> the svg specifications allows to specify some properties at the
> shape level for example to give a hint to the viewers on how to
> render the different shapes
> (http://www.w3.org/TR/SVG/painting.html#ShapeRenderingProperty).
> Depending on the viewer, I suppose some would respect these
> properties. MapServer does not at the point setup these
> properties. Is this what you are looking for?
>
> regards.
>
> Maria Neywell wrote:
>
>
> Thanks,
>
> I have already tried this way to extract my map in a svg file
> and it works. _However_, I had a svg file which corresponds to
> my map but with a lot of aliasing. The FORMATOPTION
> "FULL_RESOLUTION=TRUE" changes nothing. I tested this with and
> without option.
>
> I don't know if I did something wrong or if this is a
> mapserver problem…
>
> am I the only one to have this problem ?
>
> Regards,
>
> Maria
>
> 2009/11/24 Yewondwossen Assefa <yassefa at dmsolutions.ca
> <mailto:yassefa at dmsolutions.ca> <mailto:yassefa at dmsolutions.ca
> <mailto:yassefa at dmsolutions.ca>>>
>
>
> Hi,
>
> You could possibly specify FULL_RESOLUTION option in your
> outputformat. Something like this:
>
> OUTPUTFORMAT
> NAME svg
> MIMETYPE "image/svg+xml"
> DRIVER svg
> FORMATOPTION "FULL_RESOLUTION=TRUE"
> END
> best regards,
>
> Maria Neywell wrote:
>
> Hi list,
>
> I'm using mapserver 5.2.
>
> I have tested all mapserver exports to render my map in
> svg,
> see : http://mapserver.org/output/svg.html but, the
> point is
> that all of these outputs give me up simplified geometry. I
> want to export my map in a svg with geometries who match
> exactly with my map.
>
> did someone noticed that same weird result ?
>
> Regards,
>
> Maria
>
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> --
> ----------------------------------------------------------------
> Assefa Yewondwossen Software Analyst Email:
> assefa at dmsolutions.ca <mailto:assefa at dmsolutions.ca>
> <mailto:assefa at dmsolutions.ca <mailto:assefa at dmsolutions.ca>>
> http://www.dmsolutions.ca/
>
>
> Phone: (613) 565-5056 (ext 14)
> Fax: (613) 565-0925
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> Assefa Yewondwossen Software Analyst
> Email: assefa at dmsolutions.ca <mailto:assefa at dmsolutions.ca>
> http://www.dmsolutions.ca/
>
> Phone: (613) 565-5056 (ext 14)
> Fax: (613) 565-0925
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--
Dott. Peter Hopfgartner
R3 GIS Srl - GmbH
Via Johann Kravogl-Str. 2
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Email: peter.hopfgartner at r3-gis.com
Tel. : +39 0473 494949
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