[postgis-users] ST_MapAlgebraExpr() : what is mean [rast] ?

[Pierre Racine]

Which version of PostGIS are you using?

SELECT postgis_full_version()

> -----Original Message-----
> From: postgis-users-bounces at lists.osgeo.org [mailto:postgis-users-
> bounces at lists.osgeo.org] On Behalf Of Mahavir Trivedi
> Sent: Monday, November 19, 2012 2:37 AM
> To: PostGIS Users Discussion
> Subject: [postgis-users] ST_MapAlgebraExpr() : what is mean [rast] ?
> 
> dear friends
> 
> 
> I would to do export my raster with 10 and 200 to pixel values only .
> 
> 
> my large  tiff image stored in databse in tile format.
> when I execute following query : update demtest  set rast = ST_
> MapAlgebraExpr(rast,NULL,'[rast] between 10 and 200', NULL) where rid =2
>  error is near "[" syntax
> 
> 
> 
> pls any suggestion to design query ?
> 
> 
> with regards
> mahavir trivedi