[postgis-users] Creating a boundary of an aggregate of buildings

[Luca Bertoncello]

Am 28.01.2021 16:21, schrieb Tomas Straupis:

>   Something like:
> 
>   UPDATE city_boundaries SET way = ST_SimplifyPreserveTopology(way, 
> 100);
> 
>   before running running buffer +- update.

I get the error:

FEHLER:  Geometry type (Polygon) does not match column type 
(MultiPolygon)

Could you say me how to correct the query?

Thanks
Luca Bertoncello
(lucabert at lucabert.de)