[postgis-users] st_band with out-db raster data

[dustymugs]

I don't believe ST_Band or most functions will have the outasin flag added. ST_AsBinary is for exporting rasters from PostGIS unlike ST_Band which creates a new raster within PostGIS.

If anything, a function that converts an out-db band to in-db band may be useful.

-bborie
 
-----Original Message-----
From: Mateusz Loskot <mateusz at loskot.net>
Sender: postgis-users-bounces at lists.osgeo.org
Date: Fri, 1 Nov 2013 15:40:08 
To: PostGIS Users Discussion<postgis-users at lists.osgeo.org>
Reply-To: PostGIS Users Discussion <postgis-users at lists.osgeo.org>
Subject: Re: [postgis-users] st_band with out-db raster data

On 1 November 2013 15:10, Dilley, Andrew-P57500 <Andrew.Dilley at gdc4s.com> wrote:
> From that thread,
>
> "We need to do away with the entire in-db and out-db notion and just return the pixel values."
>
> I guess this is what I mean.  Should st_band be doing this?

I understand this is not easy to follow the thread and the comments
posted to the #2217 ticket. However, the conclusion you can draw from
those discussions is that the raster WKB format as well as
the default behaviour of basic API does not change -
PostGIS raster keeps to return server path

http://trac.osgeo.org/postgis/ticket/2217#comment:23
"""
The WKB format is currently defined (version 0) is unable to properly
handle out-db raster bands for clients.
"""

Hence, there is related ticket that adds extra parameter to override
default behaviour of the APIs

http://trac.osgeo.org/postgis/ticket/2222

I'm not a heavy user of out-db rasters, but I *perhaps* there are other APIs
like ST_Band, that should be updated according as ST_Binary has
been changed as result of the #2222 ticket.

Anyway, I'm just trying to explain you the current situation, but
I'll leave the decisions about API changes to Pierre and Bborie.

> (I'm admittedly very new to postgis so maybe this a stupid question).

IMO, no question is stupid.

Best regards,
-- 
Mateusz  Loskot, http://mateusz.loskot.net
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