[GRASS-dev] Invalid timestamp file for raster

[Sören Gebbert]

JFYI:

The temporal framework (used in t.register) ignores fractions of a
second. The smallest temporal granule is a second. Hence, it doesn't
make sense to use time-stamps for maps with fractions of a second in
the temporal framework.

Best regards
Sören

2017-10-23 22:54 GMT+02:00 Veronica Andreo <veroandreo at gmail.com>:
> Hi Nikos,
>
> Have you tried with t.register?
>
> You would need to set the start_time="2013-04-13 10:00:09.935626" plus an
> increment="10 seconds". I have not tested, but it should work.
>
> I think it's better than r.timestamp if you want to create time series, even
> though it would be great to fix the bug in r.timestamp, anyway.
>
> Cheers,
> Vero
>
>
> El 23 oct. 2017 7:38 p.m., "Nikos Alexandris" <nik at nikosalexandris.net>
> escribió:
>
>
> Nikos:
>
>
>>> This
>>>
>>> r.timestamp B1 date='13 apr 2013 10:00:09.935626' && r.timestamp B1
>>> WARNING: Invalid timestamp file for raster map <B1@>
>>>
>>> does not work. Why?
>
>
> Markus N:
>
>
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ > r.mapcalc "B1 = 2"
>> 100%
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ >  r.timestamp B1 date='13 apr
>> 2013 10:00:09.935626' && r.timestamp B1
>> WARNING: Invalid timestamp file for raster map <B1@>
>>
>> The error message is in lib/gis/timestamp.c, line 301. With debug:
>>
>>
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ >  r.timestamp B1 date='13 apr
>> 2013 10:00:09.935626'
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ >  r.timestamp B1
>> WARNING: Invalid timestamp file for raster map <B1@>
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ > g.gisenv set=DEBUG=1
>> D1/1: G_set_program_name(): g.gisenv
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ >  r.timestamp B1
>> D1/1: G_set_program_name(): r.timestamp
>> D1/1: G_find_raster(): name=B1 mapset=
>> WARNING: Invalid timestamp file for raster map <B1@>
>> D1/1: G_set_program_name(): g.gisenv
>
>
>>> The following do work:
>>>
>>> r.timestamp B1 date='13 apr 2013 10:00:19.935626' && r.timestamp B1
>>> 13 Apr 2013 10:00:19.935626
>
>
>> GRASS 7.2.3svn (nc_spm_08_grass7):~ >  r.timestamp B1 date='13 apr
>> 2013 10:00:19.935626' && r.timestamp B1
>> D1/1: G_set_program_name(): r.timestamp
>> D1/1: G_find_raster(): name=B1 mapset=user1
>> D1/1: G_set_program_name(): r.timestamp
>> D1/1: G_find_raster(): name=B1 mapset=
>> 13 Apr 2013 10:00:19.935626
>> D1/1: G_set_program_name(): g.gisenv
>>
>> There is apparently a parsing bug in 10:00:0x  <<-- 0x (while 1x etc
>> work).
>> ?
>>
>
> Obviously.
>
> Here a quick test for 0x:
>
> function seconds { printf "%02d" $1; }
> for SEC in `seq 0 1 59` ;do echo $(seconds $SEC) && r.timestamp B1 date="13
> apr 2013 10:00:$(seconds $SEC).935626" && r.timestamp B1 ;done
>
> 00
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 01
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 02
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 03
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 04
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 05
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 06
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 07
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 08
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 09
>
> WARNING: Invalid timestamp file for raster map <B1@>
> 10
> 13 Apr 2013 10:00:10.935626
> 11
> 13 Apr 2013 10:00:11.935626
> 12
> 13 Apr 2013 10:00:12.935626
>
> [..rest is fine..]
>
> Nikos
>
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