GNU.WIKI: The GNU/Linux Knowledge Base

  [HOME] [PHP Manual] [HowTo] [ABS] [MAN1] [MAN2] [MAN3] [MAN4] [MAN5] [MAN6] [MAN7] [MAN8] [MAN9]

  [0-9] [Aa] [Bb] [Cc] [Dd] [Ee] [Ff] [Gg] [Hh] [Ii] [Jj] [Kk] [Ll] [Mm] [Nn] [Oo] [Pp] [Qq] [Rr] [Ss] [Tt] [Uu] [Vv] [Ww] [Xx] [Yy] [Zz]


NAME

       v.patch   - Create a new vector map layer by combining other vector map
       layers.

KEYWORDS

       vector, geometry

SYNOPSIS

       v.patch
       v.patch help
       v.patch   [-ae]    input=name[,name,...]    output=name     [bbox=name]
       [--overwrite]  [--verbose]  [--quiet]

   Flags:
       -a
           Append  files  to existing file (overwriting existing files must be
           activated)

       -e
           Copy also attribute table
           Only the table of layer 1 is currently supported

       --overwrite
           Allow output files to overwrite existing files

       --verbose
           Verbose module output

       --quiet
           Quiet module output

   Parameters:
       input=name[,name,...]
           Name of input vector map(s)

       output=name
           Name for output vector map

       bbox=name
           Name for output vector map where bounding  boxes  of  input  vector
           maps are written to

DESCRIPTION

       v.patch  allows  the user to combine any number of vector maps together
       to create one  composite  vector  map.  If  the  table  structures  are
       identical, attributes are transferred to the new table.

NOTES

       Any  vectors  that are duplicated among the maps being patched together
       (e.g., border lines) will have to be edited or removed after v.patch is
       run. Such editing can be done automatically using v.clean.

       Lines may need to be snapped with v.clean tool=snap,break,rmdupl.

       Boundaries  may  need to be cleaned with v.clean tool=break,rmdupl,rmsa
       repeatedly until the rmsa tool (Remove small angles at nodes) no longer
       modifies  any  boundaries.  If  vector  topology  is  still  not clean,
       boundaries   may   also   need   to    be    snapped    with    v.clean
       tool=snap,break,rmdupl.

       When  using the -a flag, the user has to make sure that the features in
       the different maps added to the output  map  do  not  have  overlapping
       category  numbers,  unless identical category numbers reflect identical
       attributes, otherwise the attributes of the added  maps  are  lost.  To
       avoid  this,  the user can use v.category option=sum to change category
       values of some of the maps before patching.

EXAMPLES

       Patch together two maps with mixed feature types:
          v.patch input=geology,streams out=geol_streams

       Append one map to another:
          g.copy vect=roads,transport
          v.patch -a input=railroads output=transport --overwrite

SEE ALSO

       v.clean, v.build, v.select, v.overlay

AUTHORS

       Dave Gerdes, U.S.Army Construction Engineering Research Laboratory
       Radim Blazek, ITC-Irst, Trento, Italy

       Last changed: $Date: 2011-11-08 03:29:50 -0800 (Tue, 08 Nov 2011) $

       Full index

       © 2003-2013 GRASS Development Team



  All copyrights belong to their respective owners. Other content (c) 2014-2018, GNU.WIKI. Please report site errors to webmaster@gnu.wiki.
Page load time: 0.085 seconds. Last modified: November 04 2018 12:49:43.