[GRASS-user] External Database and projections

[Moritz Lennert]

On 07/10/15 21:09, Markus Neteler wrote:
> On Wed, Oct 7, 2015 at 12:55 PM, Blumentrath, Stefan
> <Stefan.Blumentrath at nina.no> wrote:
> ...
>> My suggestion is to not use PostGIS for big rasters, unless you have to,
>> because you want to use the data in a specific application for example.
>
> Note r.external and r.external.out of GRASS GIS 7 for avoiding data duplication:
>
> https://grass.osgeo.org/grass70/manuals/r.external.html
> https://grass.osgeo.org/grass70/manuals/r.external.out.html

Note also that in PostGIS you can "store" raster data outside the 
database and only register a reference to the file and the necessary 
metadata in the database (cf the -R flag of raster2pgsql) [1].

That way you can access the same data from GRASS GIS and from PostGIS, 
avoiding imports and exports.

Moritz


[1] 
http://postgis.net/docs/manual-2.2/using_raster_dataman.html#RT_Raster_Loader