Thread: [HACKERS] PostGIS Out-DB Raster Not Behaving As Expected

[HACKERS] PostGIS Out-DB Raster Not Behaving As Expected

From
Osahon Oduware
Date:
Hi All,

I created an out-db raster using the following syntax:

raster2pgsql -s {srid} -c -R -I -C -F -t auto {absolute_file_path} public.{table} | psql -h {host} -p {port} -d {database} -U {user}

The table was created successfully. I wanted to confirm that the actual file is being read from the location in the filesystem by performing the following steps:
1) I moved the raster file to a different location.
2) I opened QGIS and attempted to load the raster from PostGIS table.

I was surprised that QGIS could load the file. How is this possible when the actual raster data is not stored in the database table?

Re: [HACKERS] PostGIS Out-DB Raster Not Behaving As Expected

From
Robert Haas
Date:
On Mon, Apr 10, 2017 at 10:51 PM, Osahon Oduware <osahon.gis@gmail.com> wrote:
> I created an out-db raster using the following syntax:
>
> raster2pgsql -s {srid} -c -R -I -C -F -t auto {absolute_file_path}
> public.{table} | psql -h {host} -p {port} -d {database} -U {user}
>
> The table was created successfully. I wanted to confirm that the actual file
> is being read from the location in the filesystem by performing the
> following steps:
> 1) I moved the raster file to a different location.
> 2) I opened QGIS and attempted to load the raster from PostGIS table.
>
> I was surprised that QGIS could load the file. How is this possible when the
> actual raster data is not stored in the database table?

You probably want to post this to a PostGIS mailing list, rather than
a PostgreSQL mailing list, since this question is PostGIS-specific.
Probably, you want a list for user questions, rather than a list like
this one which is for development of the product itself.  I think this
may be the right one:

https://lists.osgeo.org/mailman/listinfo/postgis-users

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



Re: [HACKERS] PostGIS Out-DB Raster Not Behaving As Expected

From
Osahon Oduware
Date:
Hi Robert,

Thanks, I have done so and the issue has been resolved.

On Tue, Apr 11, 2017 at 2:56 PM, Robert Haas <robertmhaas@gmail.com> wrote:
On Mon, Apr 10, 2017 at 10:51 PM, Osahon Oduware <osahon.gis@gmail.com> wrote:
> I created an out-db raster using the following syntax:
>
> raster2pgsql -s {srid} -c -R -I -C -F -t auto {absolute_file_path}
> public.{table} | psql -h {host} -p {port} -d {database} -U {user}
>
> The table was created successfully. I wanted to confirm that the actual file
> is being read from the location in the filesystem by performing the
> following steps:
> 1) I moved the raster file to a different location.
> 2) I opened QGIS and attempted to load the raster from PostGIS table.
>
> I was surprised that QGIS could load the file. How is this possible when the
> actual raster data is not stored in the database table?

You probably want to post this to a PostGIS mailing list, rather than
a PostgreSQL mailing list, since this question is PostGIS-specific.
Probably, you want a list for user questions, rather than a list like
this one which is for development of the product itself.  I think this
may be the right one:

https://lists.osgeo.org/mailman/listinfo/postgis-users

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company