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NAME

       g.mapsets  - Modifies/prints the user’s current mapset search path.
       Affects  the  user’s  access  to  data  existing  under  the  other mapsets in the current
       location.

KEYWORDS

       general, settings, search path

SYNOPSIS

       g.mapsets
       g.mapsets --help
       g.mapsets [-lps] mapset=name[,name,...] operation=string  [separator=character]   [--help]
       [--verbose]  [--quiet]  [--ui]

   Flags:
       -l
           List all available mapsets in alphabetical order

       -p
           Print mapsets in current search path

       -s
           Launch mapset selection GUI dialog

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       mapset=name[,name,...] [required]
           Name of mapset (default: current search path)
           Name(s) of existing mapset(s) to add/remove or set

       operation=string [required]
           Operation to be performed
           Options: set, add, remove
           Default: add

       separator=character
           Field separator for printing (-l and -p flags)
           Special characters: pipe, comma, space, tab, newline
           Default: space

DESCRIPTION

       For  basic  information  about  GRASS  mapset,  location  and  data  base  refer  to GRASS
       Quickstart.

       A mapset holds a distinct set of data layers, each relevant to the same (or  a  subset  of
       the  same)  geographic  region,  and each drawn in the same map coordinate system.  At the
       outset of every GRASS session, the user identifies a GRASS data base, location, and mapset
       that  are to be the user’s current data base, current location, and current mapset for the
       duration of the session; any maps created by the user during the session  will  be  stored
       under  the  current  mapset set at the session’s outset (see g.mapset [without an "s"] and
       g.gisenv for changing the mapset with a session).

       The user can add, modify, and delete data layers that exist under  their  current  mapset.
       Although  the user can also access (i.e., use) data that are stored under other mapsets in
       the same GRASS location using the mapname@mapsetname notation or mapset search  path,  the
       user  can  only  make  permanent  changes  (create  or modify data) located in the current
       mapset.  The user’s mapset search path lists the order in which other mapsets in the  same
       GRASS  location  can  be searched and their data accessed by the user. The user can modify
       the listing and order in which these mapsets are accessed by modifying the  mapset  search
       path;  this  can  be done using the g.mapsets command. This program allows the user to use
       other’s relevant map data without altering the original data layer, and without taking  up
       disk  space  with  a copy of the original map. The mapname@mapsetname notation may be used
       irrespective of the mapset search path,  i.e.,  any  map  found  in  another  mapset  with
       sufficient g.access privileges may be called in such a manner.

       g.mapsets shows the user available mapsets under the current GRASS location, lists mapsets
       to which the user currently has access, and lists the order in  which  accessible  mapsets
       will  be  accessed by GRASS programs searching for data files.  The user is then given the
       opportunity to add or delete mapset names from the search path, or  modify  the  order  in
       which mapsets will be accessed.

       When  the  user  specifies the name of a data base element file (e.g., a particular vector
       map, raster map, imagery group file, etc.) to a GRASS program, the  program  searches  for
       the  named  file  under each of the mapsets listed in the user’s mapset search path in the
       order listed there until the program finds a file  of  the  given  name.  Users  can  also
       specify  a  file  by  its mapset, to make explicit the mapset from which the file is to be
       drawn; e.g., the command:
       g.copy raster=soils@PERMANENT,my_soils
       ensures that a new file named my_soils is to be a copy of the file soils from  the  mapset
       PERMANENT.

       In each location there is the special mapset PERMANENT included in the mapset search path,
       as this mapset typically contains base maps relevant to many  applications.  Often,  other
       mapsets  which  contain  sets  of interpreted maps will be likewise included in the user’s
       mapset search path.  Suppose, for example, that the mapset Soil_Maps contains  interpreted
       soils  map  layers  to  which  the  user wants access. The mapset Soil_Maps should then be
       included in the user’s search path variable.

       The mapset search path is saved as part of the current mapset. When the  user  works  with
       that  mapset in subsequent GRASS sessions, the previously saved mapset search path will be
       used (and will continue to be used until it is modified by the user with g.mapsets).

NOTES

       By default g.mapsets adds to the current  mapset  search  path  mapsets  named  by  mapset
       option.  Alternatively  mapsets  can be removed (operation=remove) from the search path or
       defined by operation=set.

       Users can restrict others’ access to their mapset files through use of  g.access.  Mapsets
       to  which  access  is  restricted  can  still  be  listed in another’s mapset search path;
       however, access to these mapsets will remain restricted.

EXAMPLES

   Selecting mapsets with the graphical mapset manager
       Using the -s flag, a convenient graphical mapset manager  can  be  opened  to  select  and
       deselect other mapsets (the actual mapset and the PERMANENT mapset are always selected):
       g.mapsets -s

   Print available mapsets
       All available mapsets in the current location can be printed out by
       g.mapsets -l
       Available mapsets:
       PERMANENT user1 user2

   Add new mapset
       Add mapset ’user2’ to the current mapset search path
       g.mapsets mapset=user2 operation=add
       The current mapset search path is changed accordingly
       g.mapsets -p
       Accessible mapsets:
       user1 user2

   Overwrite current search path
       Overwrite current search path
       g.mapsets mapset=user1,PERMANENT operation=set

   Using shortcuts for search path
       The current mapset can be defined by a shortcut "." (dot)
       g.mapsets mapset=.,PERMANENT operation=set
       Note:  The current mapset will be always included in the search path on the first position
       even if you change its position or omit the current mapset from the mapset option.
       g.mapsets -p
       Accessible mapsets:
       user1 PERMANENT

SEE ALSO

        g.access, g.copy, g.gisenv, g.list, g.mapset

AUTHOR

       Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
       Greg Koerper, ManTech Environmental Technology, Inc.
       Updated to GRASS 7 by Martin Landa, Czech Technical University in Prague, Czech Republic

       Last changed: $Date: 2016-01-28 12:21:34 +0100 (Thu, 28 Jan 2016) $

SOURCE CODE

       Available at: g.mapsets source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.1 Reference Manual