NAME

       r.in.poly  - Creates raster maps from ASCII polygon/line/point data files.

KEYWORDS

       raster, import

SYNOPSIS

       r.in.poly
       r.in.poly help
       r.in.poly   input=name   output=name   [title="phrase"]    [rows=integer]    [--overwrite]
       [--verbose]  [--quiet]

   Flags:
       --overwrite
           Allow output files to overwrite existing files

       --verbose
           Verbose module output

       --quiet
           Quiet module output

   Parameters:
       input=name
           Name of input file; or "-" to read from stdin

       output=name
           Name for output raster map

       title=
           Title for resultant raster map

       rows=integer
           Number of rows to hold in memory
           Default: 4096

DESCRIPTION

       r.in.poly allows the creation of GRASS binary raster maps from ASCII files in the  current
       directory containing polygon, linear, and point features.

       The  input  file  is  an ASCII text file containing the polygon, linear, and point feature
       definitions.  The format of this file is described in the INPUT FORMAT section below.

       The number of raster rows to hold in memory is per default 4096.   This  parameter  allows
       users  with  less  memory  (or  more) on their system to control how much memory r.in.poly
       uses.  Usually the default value is fine.

NOTES

       The data will be imported using the current region settings to set the  new  raster  map's
       bounds  and  resolution.  Any features falling outside the current region will be cropped.
       The region settings are contolled with the g.region module.

       The format is a simplified version of the standard  GRASS  vector  ASCII  format  used  by
       v.in.ascii.

       Polygons are filled, i.e. they define an area.

   Input Format
       The  input  format  for  the  input  file consists of sections describing either polygonal
       areas, linear features, or point features. The basic format is:
       A                      <for polygonal areas>
           easting northing
           .
           .
           .
       =   cat# label
       L                      <for linear features>
           easting northing
           .
           .
           .
       =   cat# label
       P                      <for single cell point features>
           easting northing
       =   cat# label
        The A signals the beginning of a filled polygon.  It must appear  in  the  first  column.
       The L signals the beginning of a linear feature.  It also must appear in the first column.
       The P signals the beginning of a single cell point feature.  Again, it must appear in  the
       first column.  The coordinates of the vertices of the polygon, or the coordinates defining
       the linear or point feature follow and must have a space in the first column and at  least
       one  space  between the easting and the northing. To give meaning to the features, the "="
       indicates that the feature currently being processed has category value cat#  (which  must
       be an integer) and a label (which may be more than one word, or which may be omitted).

EXAMPLE

       An area described by four points:
       A
         591316.80   4926455.50
         591410.25   4926482.40
         591434.60   4926393.60
         591341.20   4926368.70
       = 42 stadium

SEE ALSO

        r.digit (for interactive on-screen polygon/line digitizing for raster maps)
       r.colors (for raster map color table creation)
       d.rast.edit
       g.region
       r.in.xyz
       r.patch
       v.in.ascii
       v.digit

AUTHOR

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

       Last changed: $Date: 2008-05-21 11:40:03 -0700 (Wed, 21 May 2008) $

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       © 2003-2013 GRASS Development Team