Re[Gdal-dev] ndering optimization [Re: Looking for huge vector dataset]

[Fodder]

Hi Andrea,

With regards to the simplification algorithm you mentioned, do you have an
example of how this might work? or know of any sample code?

I would think this is something that would be well suited to building into
OGR. With the increasing complexity and size of vector datasets, I would
think that SetScale (As Frank suggested) would be just as relevant as
SetSpatialFilter or SetAttributeFilter....


Cheers,
Fodder


aaime wrote:
> 
> My 2 cents from Geotools/Geoserver land. We are using both tecniques in
> fact, that is:
> * our renderer subsystem gathers data from the datastores (the equivalent
>    of OGR data sources) and do generalize them on the fly using a simple
>    distance based algorithm before passing them to the rendering pipeline.
>    This buys us some 30%-50% speedup, more if data needs to be reprojected
>    because we try to generalize before reprojecting
> 
> Hope this helps
> Cheers
> Andrea
> _______________________________________________
> Gdal-dev mailing list
> Gdal-dev at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/gdal-dev
> 
> 

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