[gdal-dev] OGR Feature Style Specification

[Ari Jolma]

People,

As discussed in the OSGeo-Discuss list, there might be an interest, 
need, etc. to rethink feature styles. My suggestion would be to look 
into the SVG specification and refer to it as much as possible. Also 
something meta to that would be useful, i.e., saying that this feature 
is to be rendered using this symbol, and the symbol would be presented 
as a SVG snippet. I'd also like to render raster cells using symbols, 
the best known example being perhaps the flow direction arrow of raster 
DEMs.

The issue of rules - which symbols to use and tieing symbols and their 
properties into feature attributes - is perhaps unavoidable. It could be 
handled using the OGC symbology encoding spec (which also uses SVG 
styles), but does the whole thing get too big or out of scope for GDAL? 
One easily gets carried away. For example once we have SVG style and the 
geometry available, we could spit out SVG paths... which brings up the 
idea of having line simplification in OGR, etc...

If thought sensible in the first place I could try writing down this as 
a RFC.

Regards,

Ari

-- 
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