[postgis-users] How to Construct a raster in pl/pgsql function?

[George Silva]

Hello Pierre,

That will do just fine.

Thanks for your help.

George

On Wed, Jul 21, 2010 at 12:42 PM, Pierre Racine <Pierre.Racine at sbf.ulaval.ca
> wrote:

>  Hi George,
>
>
>
> Unfortunalely st_setvalue is not yet implemented. You could have created an
> empty raster (st_makeemptyraster) and set the pixels values with
> st_setvalue.
>
>
>
> The only way to create a raster and set specific pixels value now is to
> generate the HEX values representing the raster and to cast them to
> ::raster. You will find the best example of this in regress/ create_rt_band_properties_test.sql
> in the source tree.
>
>
>
> Pierre
>
>
>
> *From:* postgis-users-bounces at postgis.refractions.net [mailto:
> postgis-users-bounces at postgis.refractions.net] *On Behalf Of *George Silva
> *Sent:* 21 juillet 2010 09:59
> *To:* PostGIS Users Discussion
> *Subject:* [postgis-users] How to Construct a raster in pl/pgsql function?
>
>
>
> Hello guys,
>
> I'm trying to write a function to calculate flow direction using SQL, in
> moving windows of 9x9 pixel size.
>
> How can I write a output raster? What is the way to create a specific
> raster?
>
> George
>
> --
> George R. C. Silva
>
> Desenvolvimento em GIS
> http://blog.geoprocessamento.net
>
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>
>


-- 
George R. C. Silva

Desenvolvimento em GIS
http://blog.geoprocessamento.net
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