[postgis-users] aggregate different geometries

[Martin Davis]

On Mon, May 20, 2019 at 7:02 AM Braune, Christopher <
Christopher.Braune at lfu.brandenburg.de> wrote

>
>
> The target is the smallest geometry that contains all single geometries.
> For example, three points creates a triangle-polygon.
>

Do you mean you want the convex hull of the grouped geometries?   If so,
you could use ST_ConvexHull.  It's not an aggregate function (which it
should be), but you can use ST_Collect to aggregate the geometries to run
it on.

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