Hi Andrea,
Interesting stuff.
* ST_simplify usage does indeed help at all scales in these benchmarks,
> probably because even at 1:150000 we're
> still somewhat away from the native resolution of the data
OS Strategi has a desired scale range of 1:187,500 - 1:312,500, with the
nominal scale being 1:250,000. Or so says their technical spec; maybe it
hasn't been generalised enough.
* It has all the linework (roads, waterways, borders, whatever) heavily
> using translucency, I'm pretty sure none of these roads should really
> be translucent in a map
Yep. As noted in my previous email from earlier in this discussion, I was
going to get rid of that, and actually did that Tuesday. My
improved/optimised set of SLD's are at the below link. That was one of the
first things I styled in GeoServer, so I was still learning a lot.
There's also a second set of SLD's plus the layergroup too - these are for
Strategi as well but a completely different style. They should give
different benchmark results (I find this neutral styling renders faster).
Both sets are in this file:
http://maps.warwickshire.gov.uk/misc/strategi_styles_2.zip
----
Also, the Oracle dump of the data is ready -
http://maps.warwickshire.gov.uk/misc/os_strategi.dmp.Z
Cheers,
Jonathan
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