[GRASS-dev] TGRASS: granularity question concerning MODIS LST maps

[Markus Neteler]

On Sat, Sep 12, 2015 at 8:08 PM, Sören Gebbert
<soerengebbert at googlemail.com> wrote:
> Hi Markus,
> Am 12.09.2015 14:43 schrieb "Markus Neteler" <neteler at osgeo.org>:
>>
>> On Sat, Sep 12, 2015 at 12:42 PM, Sören Gebbert
>> <soerengebbert at googlemail.com> wrote:
>> >
>> > Hi,
>> > From 10:30 to 13:30 are 180 minutes. This is the smallest gap size
>> > between the time instances.
>> > And it is the greatest common divider between all gaps in the time
>> > series.
>>
>> Sure but in the end that's not of great relevance when dealing with
>> irregular, absolute data, right?
>> So I can basically ignore it here? Just to be sure.
>
> I am not sure what you expect from the granularity? In case it is of no
> relevance for you, then you can simply ignore it. If you dont need this kind
> of temporal information in an aggregation process, ignore it.

Not sure myself: I have four irregular overpasses (i.e. maps) per day,
from which I want to generate e.g. weekly averages.
I suppose that it is not relevant then?

> However, you can use it as indicator of the import procedure and time stamp
> quality of your dataset. In this case indicates the granularity correctly
> alligned time stamps.

ok, thanks.

(I added a granularity note in r66182 to the manual)

ciao
Markus