NAME¶

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

KEYWORDS¶

raster, metadata, timestamp

SYNOPSIS¶

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

Parameters:¶

map=name

 

Name of input 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 convience, 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' Removes the timestamp for the "soils" raster map.
r.timestamp map=soils date=none

BUGS¶

Spaces in the timestamp value are required.

SEE ALSO¶

r.info

AUTHOR¶

Michael Shapiro, U.S.Army Construction Engineering Research Laboratory Last changed: $Date: 2012-01-28 21:54:52 +0100 (Sat, 28 Jan 2012) $ Full index © 2003-2014 GRASS Development Team