[GRASS-user] GRASS7 temporal GIS database questions

[Rainer M. Krug]

Hi

Sören Gebbert <soerengebbert at googlemail.com> writes:

> Hi Rainer,
>
>
> 2013/5/22 Rainer M. Krug <Rainer at krugs.de>
>
>> Hi
>>
>> I am doing spatio-temporal simulations with R and GRASS and IO am
>> thinking about using a temporal GIS database to store the resulting
>> raster layers in.
>>
>> But I have a few questions about the temporal GIS database:
>>
>> 1) If I register a raster map in a temporal GIS database via r.register,
>> can I delete the original raster map and the info is stored in the
>> temporal GIS database?
>>
>
> Yes, the info is still stored in the temporal database, unless you call
> t.support with -m option.
>
>
>>
>> 2) If 1) is possible, can I extract the raster layer again from the
>> temporal GIS database?
>>
>> No, that's not possible since only the spatio-temporal extent and some
> metadata is stored in the temporal database. The map data itself will not
> copied.
>

OK - that is the info I needed. In this case, the spatio temporal
database is not an option for me for archiving.
>
>> 3) Summarizing: Is the temporal GIS database a good archiving place for
>> the layers I create during the simulation?
>>
>
> If you think that GRASS is a good archiving place then yes. But be aware
> that a large temporal database with lots of maps with slow down the
> temporal database access. If you want to store >10.000 maps, then you
> should use postgresql as temporal database backend.

I was thinking about this - but seting up a postgresql server on a
cluster and to maintain it (or bug the administrator to do it) as I am
the only one using it, is not an option at the moment - but I'll keep it
definitely in mind.

Thanks a lot,

Rainer

>
>
> Best regards
> Soeren
>
>
>>
>> Thanks,
>>
>> Rainer
>>
>>
>> --
>> Rainer M. Krug
>>
>> _______________________________________________
>> grass-user mailing list
>> grass-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/grass-user
>>
>>

-- 
Rainer M. Krug
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 489 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/grass-user/attachments/20130524/449efe33/attachment.pgp>