Provided by: grass-doc_6.4.3-3_all bug


       g.setproj  - Interactively reset the location's projection settings.


       general, projection


       g.setproj help
       g.setproj  [--verbose]  [--quiet]


       Allows  a user to create a PROJ_INFO file in the PERMANENT mapset of the current location.
       PROJ_INFO file is used to record the projection information associated with the  specified


       The  user  running  g.setproj  must  own  the  PERMANENT  mapset  and it must be currently
       selected.  It is highly recommended to run g.setproj after creating a new location so that
       conversion programs (such as v.proj) can be run.

       The  user  will  be prompted for the projection name.  Most projections are supported. The
       PROJ.4 abbreviations for the names are used with two exceptions, viz. 'll', for latitude /
       longitude geographic co-ordinates, and 'stp', for the State Plane Co-ordinate system (used
       in the USA).

       After the projection name, the user will be asked  for  a  geodetic  datum.  If  no  datum
       transformation  support is needed, the question may be answered with no, and no datum will
       be specified in the PROJ_INFO file. If  this  is  the  case  the  user  must  specify  the
       ellipsoid  (model of the curvature of the earth) to be used, otherwise it is determined by
       the datum being used.

       If  the  datum  or  ellipsoid  required  are  not  listed   within   this   program,   the
       user/administrator  may  add the definition to the files datum.table, datumtransform.table
       and ellipse.table in the $GISBASE/etc/ directory.

       Depending on the projection selected, the user will then be prompted for the various other
       parameters required to define it.

       The  projections  of  aea, lcc, merc, leae, leac, and tmerc will generate a request to the
       user for the prime meridian and standard parallel for the output map.


       g.proj, m.proj, r.proj, v.proj, PROJ.4

       Further reading

                      A guide to Map Projections by USGS

                      ASPRS Grids and Datum

                      MapRef - The Collection of Map Projections and Reference Systems for Europe

                      Projections Transform List (PROJ4)


       Irina Kosinovsky, U.S. Army Construction Engineering Research Laboratory
       Morten Hulden, morten at - rewrote module and added 121 projections
       Andreas Lange, andreas.lange at - added prelimnary map datum support

       Last changed: $Date: 2012-03-30 04:47:33 -0700 (Fri, 30 Mar 2012) $

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