[OSGeo-Discuss] Proposal: OSGeo Cartographic Library

Ari Jolma ari.jolma at tkk.fi
Tue Apr 15 11:31:17 PDT 2008

Bart van den Eijnden (OSGIS) kirjoitti:
> One addition to what Chris points out, to complicate things :-), SVG 
> vector symbols can also be used inside an SLD document (for a Mark).
> To be even more precise, we are really talking about the Symbology 
> Encoding (SE) spec here. SLD as of version 1.1 only deals with the 
> integration of symbology encoding into WMS. Symbology (and the rules) 
> was taken out of SLD since it is more generic than only WMS. But most 
> current implementations still use SLD 1.0 where all is in one spec.
> http://www.opengeospatial.org/standards/symbol

Thanks, I did not know about this. Looks interesting, combines SVG 
styles and even symbols. Lots of focus on the rules, i.e., rendering 
based on features properties and map scales.

This is an XML schema, (how) does it help us with concretizing the map 
composer / cartographic library idea? What's the software that the 
library implies, gonna do?

> SVG *isn't* a rule language: SVG is one possible output of taking a Rule
> language (SLD), combining it with geography and attributes (GML,
> Shapefile, what have you), and creating a final product.

One more example of how we talk about different things. In my problems 
the interaction is perhaps more important than final products. I think 
of SVG as a technology of getting the current problem/idea/plan/desing 
on the screen.



Prof. Ari Jolma
Geoinformatiikka / Geoinformatics
Teknillinen Korkeakoulu / Helsinki University of Technology
tel: +358 9 451 3886 address: POBox 1200, 02015 TKK, Finland
Email: ari.jolma at tkk.fi URL: http://www.tkk.fi/~jolma

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