r.timestampgrass - Online in the Cloud

PROGRAM:

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 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

KNOWN ISSUES

Spaces in the timestamp value are required.

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