Re: [postgis-users] ST_Aspect artifacts?

2012-05-28 Thread Paolo Cavallini
Il 25/05/2012 19:29, David B�langer ha scritto: > May be you can use gdal_dem with PostGis Raster reader (mode 2) if you want > create > derived product from DEM? http://www.gdal.org/gdaldem.html >

Re: [postgis-users] ST_Aspect artifacts?

2012-05-25 Thread David B�langer
rasters you can use gdal_translate with PostGis Raster reader (mode 2). David > Date: Fri, 25 May 2012 19:08:23 +0200 > From: cavall...@faunalia.it > To: postgis-users@postgis.refractions.net > Subject: Re: [postgis-users] ST_Aspect artifacts? > > Il 25/05/2012 19:02, Pierre

Re: [postgis-users] ST_Aspect artifacts?

2012-05-25 Thread Paolo Cavallini
Il 25/05/2012 19:02, Pierre Racine ha scritto: > Yeah. ST_Union is good for unioning overlapping rasters (e.g. computing the > mean of a temperature series) but not for merging adjacent rasters. We will > have to write something else for that. > ok. again, thanks for clarifying. all the best. --

Re: [postgis-users] ST_Aspect artifacts?

2012-05-25 Thread Pierre Racine
ns.net [mailto:postgis-users- > boun...@postgis.refractions.net] On Behalf Of Paolo Cavallini > Sent: Friday, May 25, 2012 12:53 PM > To: postgis-users@postgis.refractions.net > Subject: Re: [postgis-users] ST_Aspect artifacts? > > Il 25/05/2012 18:29, Pierre Racine ha scritto: > > Not y

Re: [postgis-users] ST_Aspect artifacts?

2012-05-25 Thread Paolo Cavallini
Il 25/05/2012 18:29, Pierre Racine ha scritto: > Not yet... I imagined, thanks. So I tried to merge the rasters with ST_Union, but I had to stop after ~2h with pg@100% CPU (a small raster, 1300 tiles 64x64). Urgh! All the best. -- Paolo Cavallini See: http://www.faunalia.it/pc __

Re: [postgis-users] ST_Aspect artifacts?

2012-05-25 Thread Pierre Racine
Not yet... > -Original Message- > From: postgis-users-boun...@postgis.refractions.net [mailto:postgis-users- > boun...@postgis.refractions.net] On Behalf Of Paolo Cavallini > Sent: Friday, May 25, 2012 8:57 AM > To: PostGIS Users Discussion > Subject: [postgis-users] S

[postgis-users] ST_Aspect artifacts?

2012-05-25 Thread Paolo Cavallini
Hi all. The raster resulting from: CREATE TABLE aspect as select rid, ST_aspect(rast,1,'8BUI') as rast from hdr; does not calculate correctly values along the borders of the tiles. Any way to avoid this? All the best. -- Paolo Cavallini See: http://www.faunalia.it/pc