[postgis-users] ST_AsJpeg

[Joan]

The last two solutions result in a black square, which I think is the tile.
But it's a good start. I will have to look more into that.
Regina, I have tried using \g to out put to a file but the file is
corrupted.

I appreciate the help.

Joan

On 14 February 2012 21:27, Paragon Corporation <lr at pcorp.us> wrote:

> We have this documented in the docs.
>
>
> http://www.postgis.org/documentation/manual-svn/using_raster.xml.html#RT_Ras
> ter_Applications
>
> There is an example for doing it with PHP, .NET, Java, and PLPython
>
> Sorry don't have one for psql only.  Haven't tried using psql for
> outputting
> files.
>
> Regina
> http://www.postgis.us
>
>
>
>
>
> > -----Original Message-----
> > From: postgis-users-bounces at postgis.refractions.net
> > [mailto:postgis-users-bounces at postgis.refractions.net] On
> > Behalf Of Pierre Racine
> > Sent: Tuesday, February 14, 2012 11:05 AM
> > To: PostGIS Users Discussion
> > Subject: Re: [postgis-users] ST_AsJpeg
> >
> > So you might have to write a script connecting to PostgreSQL
> > and writing the file for you. See an example in:
> >
> > http://www.bostongis.com/blog/index.php?/archives/175-Minimali
> > st-Web-based-PHP-PostGIS-2.0-Spatial-GeometryRaster-Viewer.html
> >
> > Pierre
> >
> > > -----Original Message-----
> > > From: postgis-users-bounces at postgis.refractions.net
> > > [mailto:postgis-users- bounces at postgis.refractions.net] On
> > Behalf Of
> > > Joan
> > > Sent: Tuesday, February 14, 2012 10:10 AM
> > > To: PostGIS Users Discussion
> > > Subject: Re: [postgis-users] ST_AsJpeg
> > >
> > > Yes, I want to create a jpeg/tiff file. I am new to
> > cursors, how would
> > > that work in a query.
> > >
> > >
> > > On 14 February 2012 15:39, Pierre Racine
> > <Pierre.Racine at sbf.ulaval.ca> wrote:
> > >
> > >
> > >     Thanks,
> > >
> > >     Do you see any way to make the file directly readable
> > (without having
> > > to edit it)?
> > >
> > >
> > >     Pierre
> > >
> > >     > -----Original Message-----
> > >     > From: postgis-users-bounces at postgis.refractions.net
> > > [mailto:postgis-
> > > users-
> > >
> > >     > bounces at postgis.refractions.net] On Behalf Of Sandro Santilli
> > >     > Sent: Tuesday, February 14, 2012 9:28 AM
> > >     > To: PostGIS Users Discussion
> > >
> > >     > Subject: Re: [postgis-users] ST_AsJpeg
> > >     >
> > >     > On Tue, Feb 14, 2012 at 09:22:21AM -0500, Pierre Racine wrote:
> > >     > > Yes. You want to write the file directly to the filesystem?
> > > Sandro wrote
> > >     > something in the list about this recently but I can't
> > find it. Sandro?
> > > Robe?
> > >     > >
> > >     >
> > >     > I ended up binary-editing the result afterwards.
> > >     >
> > >     > Anyway, first step is declaring a binary cursor,
> > redirecting output
> > > to a file and
> > >     > calling the function.
> > >     >
> > >     > For the binary editing, I looked at another file with
> > my expected
> > > format to tell
> > >     > where it started (human eye pattern matching).
> > >     >
> > >     > > You can also use gdal_translate...
> > >     >
> > >     > Much better, when it works (it wasn't working for me).
> > >     >
> > >     > --strk;
> > >     >
> > >     >   ,------o-.
> > >     >   |   __/  |    Delivering high quality PostGIS 2.0 !
> > >     >   |  / 2.0 |    http://strk.keybit.net
> > >     >   `-o------'
> > >     >
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