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       r.timestamp  - Modifies a timestamp for a raster map.
       Print/add/remove a timestamp for a raster map.


       raster, metadata, timestamp, time


       r.timestamp --help
       r.timestamp map=name  [date=timestamp]   [--help]  [--verbose]  [--quiet]  [--ui]

           Print usage summary

           Verbose module output

           Quiet module output

           Force launching GUI dialog

       map=name [required]
           Name of raster map

           Datetime, datetime1/datetime2, or ’none’ to remove
           Format: ’15 jan 1994’ (absolute) or ’2 years’ (relative)


       This  command  has 2 modes of operation. If no date argument is supplied, then the current
       timestamp for the raster map is printed.  If  a  date  argument  is  specified,  then  the
       timestamp for the raster map is set to the specified date(s). See examples below.


       Strings  containing  spaces  should  be  quoted.  For  specifying a range of time, the two
       timestamps should be separated by a forward slash. To remove the timestamp from  a  raster
       map, use date=none.


       The  timestamp  values must use the format as described in the GRASS Datetime Library. The
       source tree for this library should have a description of the format. For convenience, the
       formats are reproduced here:

       There are two types of datetime values:

           ·   absolute and

           ·   relative.
       Absolute values specify exact dates and/or times. Relative values specify a span of time.

       The general format for absolute values is:
         day month year [bc] hour:minute:seconds timezone
                 day is 1-31
                 month is jan,feb,...,dec
                 year is 4 digit year
                 [bc] if present, indicates dates is BC
                 hour is 0-23 (24 hour clock)
                 minute is 0-59
                 second is 0-59.9999 (fractions of second allowed)
                 timezone is +hhmm or -hhmm (eg, -0600)
       Some parts can be missing, for example
                 1994 [bc]
                 Jan 1994 [bc]
                 15 jan 1000 [bc]
                 15 jan 1994 [bc] 10 [+0000]
                 15 jan 1994 [bc] 10:00 [+0100]
                 15 jan 1994 [bc] 10:00:23.34 [-0500]

       There  are  two  types of relative datetime values, year-month and day-second. The formats
                 [-] # years # months
                 [-] # days # hours # minutes # seconds
       The words years, months, days, hours, minutes, seconds are literal words, and  the  #  are
       the numeric values. Examples:
                 2 years
                 5 months
                 2 years 5 months
                 100 days
                 15 hours 25 minutes 35.34 seconds
                 100 days 25 minutes
                 1000 hours 35.34 seconds
       The  following  are illegal because it mixes year-month and day-second (because the number
       of days in a month or in a year vary):
                 3 months 15 days
                 3 years 10 days


       Prints the timestamp for the "soils" raster map. If there is  no  timestamp  for  "soils",
       nothing  is  printed.  If  there  is  a  timestamp,  one  or two time strings are printed,
       depending on if the timestamp for the map consists of a single date or two dates (ie start
       and end dates).
       r.timestamp map=soils
       Sets the timestamp for "soils" to the single date "15 sep 1987".
       r.timestamp map=soils date=’15 sep 1987’
       Sets  the  timestamp for "soils" to have the start date "15 sep 1987" and the end date "20
       feb 1988".
       r.timestamp map=soils date=’15 sep 1987/20 feb 1988’
       Sets the timestamp for "soils" to have the start date "18 feb 2005 10:30:00" and  the  end
       date "20 jul 2007 20:30:00".
       r.timestamp map=soils date=’18 feb 2005 10:30:00/20 jul 2007 20:30:00’
       Removes the timestamp for the "soils" raster map.
       r.timestamp map=soils date=none


       Spaces in the timestamp value are required.

SEE ALSO, r3.timestamp, v.timestamp


       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory

       Last changed: $Date: 2017-02-22 22:19:55 +0100 (Wed, 22 Feb 2017) $


       Available at: r.timestamp source code (history)

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