[GRASS-dev] Seasonal temporal granularity

[Luca Delucchi]

On 14 August 2015 at 00:35, Sören Gebbert <soerengebbert at googlemail.com> wrote:
> Hi,

Hi,

> to reduce a bit of confusion. You can apply a time interval of
> arbitrary size to a map layer. Use the input file option of t.register
> and specify the interval size in the input file:
>

yes in t.register there aren't problems...

> name|start_time|end_time
> map_1|2001-03-22 00:00:00|2001-06-21 00:00:00
> map_2|2001-06-21 00:00:00|2001-09-24 00:00:00
> map_3|2001-09-24 00:00:00|2001-12-21 00:00:00
> map_4|2001-12-21 00:00:00|2002-03-22 00:00:00
> ...
>
> Be aware that time intervals in the temporal framework are left
> closed, right open intervals. Hence, the end time is not part of the
> interval, but the start time of a potential successor.
> This assures gap free creation of temporal topological correct time series.
>
> The computed granularity of the resulting space-time dataset (STDS)
> will be 1 day, since 1 day is the greatest common divider of all the
> seasonal time intervals in the STDS.
> IMHO, there is no urgent need to support a user defined granularity in
> the temporal framework. The Gregorian Calendar hierarchy is almost
> sufficient.
>

for the aggregation I think this is needed...
how can I calculate average seasonal temperature starting from a daily
temperatures temporal dataset?

> Best regards
> Soeren
>


-- 
ciao
Luca

http://gis.cri.fmach.it/delucchi/
www.lucadelu.org