[postgis-users] get extent of bunch of boxes

[Fred Lehodey]

Hi Marco,

ST_Extent();

http://postgis.refractions.net/documentation/manual-1.5/ST_Extent.html


Fred


On Mon, Apr 12, 2010 at 5:47 PM, Marco Lechner - FOSSGIS e.V. <
marco.lechner at fossgis.de> wrote:

> hi
> i'm calculating some hundred boxes of linegeometries to get the extent
> of each of the records.
> now i need the overall extent (box). is there a way to get the box of a
> bunch of boxes? or what is the fastest way to calculate this. I guess
> merging all the linegeometries and the calculating the box might not be
> the fastest, because merging the geometries costs more then looking on
> boxes - or am i wrong?
>
> Marco
>
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