[postgis-users] ST_Slope

[Pierre Racine]

James,

I think you will have to upgrade.

What is the result of SELECT PostGIS_Scripts_Build_Date()?

ST_Slope was introduced on nov 30th, 2011...

Pierre

> -----Original Message-----
> From: postgis-users-bounces at postgis.refractions.net [mailto:postgis-users-
> bounces at postgis.refractions.net] On Behalf Of JamesH
> Sent: Tuesday, March 27, 2012 11:45 AM
> To: postgis-users at postgis.refractions.net
> Subject: Re: [postgis-users] ST_Slope
> 
> Hi Stephen,
> 
> Thanks, I have been attempting to use this query:
> SELECT
> 	ST_Slope(ST_MapAlgebraExpr(ST_AddBand(ST_MakeEmptyRaster(10,
> 10, 0, 0, 0.1, 0.1, 0, 0, 4269), '8BUI'::text, 1, 0), '32BUI', '([rast.x] - 1) * 10 +
> [rast.y]')
> , 1, '8BUI')
> FROM
> 	nclheights;
> 
> I have included the ::text cast which now returns an error of "function
> st_slope(raster, integer, text) does not exist, No function matches the given
> name and argument types".
> 
> Trying to produce a slope surface from a 1 band raster - unsuccessfully.
> 
> Regards,
> James
> 
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> tp4551303p4661339.html
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