[postgis-users] ST_CreateOverview doesn't honor tilesize

Mateusz Loskot mateusz at loskot.net
Wed Aug 30 11:45:26 PDT 2017

On 30 August 2017 at 14:52, Senshi <tassilo.m at gmail.com> wrote:
> Hello,
> when creating an overview, the tilesize of the original tiles is not fully
> respected.
> If you have a 2x2 grid of tiles with 256x256 pixels each, and then create an
> overview with a scale of 3,  the resulting single tile will end up as 171
> pixels wide/tall.

Overview with factor = 3 are 'special'.
 Have a look at discussion here

Best regards,
Mateusz Loskot, http://mateusz.loskot.net

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