r.timestamp.1grass - Man Page

Name

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

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=nameÂ [required]: Name of raster map
date=timestamp: Datetime, datetime1/datetime2, or ’none’ to remove
Format: ’15 jan 1994’ (absolute) or ’2 years’ (relative)

r.timestamp has two 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

Info

GRASS 8.4.1 GRASS GIS User's Manual

r.timestamp.1grass - Man Page

Name

Keywords

Synopsis

Flags

Parameters

Description

Notes

Timestamp Format

Absolute

Relative

Examples

Known Issues

See Also

Author

Source Code

Info