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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
r.timestamp map=name [date=timestamp] [--verbose] [--quiet]
- Name of input 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 convience, the formats are reproduced
There are two types of datetime values:
Absolute values specify exact dates and/or times. Relative values
specify a span of time.
The general format for absolute values is:
Some parts can be missing, for example
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)
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 are:
The words years, months, days, hours, minutes, seconds are literal
words, and the # are the numeric values. Examples:
[-] # years # months
[-] # days # hours # minutes # 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):
2 years 5 months
15 hours 25 minutes 35.34 seconds
100 days 25 minutes
1000 hours 35.34 seconds
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
Sets the timestamp for "soils" to the single 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'
Removes the timestamp for the "soils" raster map.
r.timestamp map=soils date='15 sep 1987/20 feb 1988'
r.timestamp map=soils date=none
Spaces in the timestamp value are required.
Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
Last changed: $Date: 2012-01-28 12:54:52 -0800 (Sat, 28 Jan 2012) $
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