xenial (1) v.timestamp.1grass.gz

NAME

       v.timestamp  - Modifies a timestamp for a vector map.
       Print/add/remove a timestamp for a vector map.

KEYWORDS

       vector, metadata, timestamp, time

SYNOPSIS

       v.timestamp
       v.timestamp --help
       v.timestamp map=name  [layer=string]   [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 vector map
           Or data source for direct OGR access

       layer=string
           Layer number or name
           Vector  features  can have category values in different layers. This number determines which layer to
           use. When used with direct OGR access this is the layer name.
           Default: 1

       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  vector map is printed. If a date argument is specified, then the timestamp for the vector 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 vector 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 "lidar" vector map. If  there  is  no  timestamp  for  "lidar",  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).
           v.timestamp map=lidar
       Sets the timestamp for "lidar" to the single date "15 sep 1987".
           v.timestamp map=lidar date=’15 sep 1987’
       Sets the timestamp for "lidar" to have the start date "15 sep 1987" and the end date "20 feb 1988".
           v.timestamp map=lidar date=’15 sep 1987/20 feb 1988’
       Removes the timestamp for the "lidar" vector map.
           v.timestamp map=lidar date=none

KNOWN ISSUES

       Spaces in the timestamp value are required.

SEE ALSO

        v.info

AUTHOR

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

       Last changed: $Date: 2015-05-11 02:16:13 +0200 (Mon, 11 May 2015) $

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