On 13/07/2015 5:32 p.m., Jody Garnett wrote:
> Gere is the link: 
> http://docs.geotools.org/latest/userguide/library/data/pregeneralized.html 
>
>
> You can configure it to swap between tables (or between geometry 
> columns) based on scale. Swapping between tables is nice as when 
> zoomed out you can use a smaller dataset. But even swapping between 
> geometry columns is useful as you can use geometry with less points 
> speeding everthing up.
>
> The SLD does not know what is going on; it just gets different sets of 
> geometry to draw.
>
> It works great, something to keep in mind the next time you do 
> performance optimization for GeoServer.
Thanks Jody. I hadnt seen that plugin and I can certainly use it for 
switching between tables. (For the geology case, smaller polygons are 
eliminated as scale increases).

What about case where detailed geometry exists for some geometry but 
all? ie, I would like logic like " geom = (geom_20!=null)?geom_20:geom_50"


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