[postgis-users] How we get raster values

[Tom van Tilburg]

Hi Ahmet,

It depends on how you would like to have the values returned.
If it's an average (or some other kind of statistics) I think you need a 
two step approach:

1) Clip the raster where it intersects with the polygon:
     http://postgis.net/docs/RT_ST_Clip.html

2) Do you stats on the resulting clipped image:
     http://postgis.net/docs/RT_ST_SummaryStats.html

Hope this helps,
     Tom

On 7/27/2015 4:16 PM, Ahmet Temiz wrote:
>  Hello,
>
> How can we get raster values of a map that intersects with certian 
> part of a polygon map ?
>
>  regards
>
> -- 
> Ahmet Temiz
> Jeoloji Müh.
> Afet ve Acil Durum Yönetimi Başkanlığı
> Bilgi İşlem  Dairesi Başkanlığı-CBS Grubu
>
>
> ________________________
>
> Ahmet Temiz
> Geological Eng.
> Information Systems - GIS Group
> Disaster and Emergency Management
> of Presidency
>
>
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