[postgis-users] St_dumpAsPolygons function is too slow

[Elmehdi OUADOUD]

Hi,

I wonder know if the very very slow process is normal or i'm missing 
something?

thanks in advance

Le mercredi 15 juillet 2015 10:11:46 UTC+2, Elmehdi OUADOUD a écrit :
>
> Hi All, 
>  
> I want to transfom a raster data to polygons but the process is too slow 
> it takes 35 minutes.
> The querie i'm using : 
>
>     *   select (ST_DumpAsPolygons(a.raster)).geom, 
> (ST_DumpAsPolygons(a.raster)).val*
> *       from my_raster a*
>
> Dimensions of my_raster
>
> X: 5261 Y: 4401
>
> I'm missing something or it's normal ?
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20150720/d46a0334/attachment.html>