[Geoserver-devel] [postgis-users] Re: Postgis estimated_extent completely off the mark?

[Paul Ramsey]

Once again I wonder why we're not pulling the extent off of the top  
node of the index.

On 20-Mar-07, at 8:20 AM, Andrea Aime wrote:

> Paul Ramsey ha scritto:
>> Right, sampling.
>> Small enough that a random sample has a chance of missing them.    
>> Northern islands in Alaska, Hawaii, etc.
>
> So this is a feature, not a bug, apparently.
> Heh, then the docs should say that estimated_extent is 5% off the
> proper bounds if features are uniformly distributed in the actual
> bounds :-)
> If you have data with strange distribution patters (such as USA
> states) better not rely on it.
>
> Cheers
> Andrea
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