NAME

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

KEYWORDS

       raster, metadata, timestamp, time

SYNOPSIS

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

   Flags:
       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       map=name [required]
           Name of raster map

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

DESCRIPTION

       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.

NOTES

       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.

TIMESTAMP FORMAT

       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.

   Absolute
       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]

   Relative
       There are two types of relative datetime values, year-month and day-second. The formats are:
                 [-] # 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

EXAMPLES

       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

KNOWN ISSUES

       Spaces in the timestamp value are required.

SEE ALSO

        r.info, r3.timestamp, v.timestamp

AUTHOR

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

SOURCE CODE

       Available at: r.timestamp source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual