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]    [type=string]    [null=integer]    [rows=integer]
       [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

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

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

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

       output=name [required]
           Name for output raster map

       title=phrase
           Title for resultant raster map

       type=string
           Type of raster map to be created
           Storage type for resultant raster map
           Options: CELL, FCELL, DCELL
           Default: CELL
           CELL: Integer
           FCELL: Single precision floating point
           DCELL: Double precision floating point

       null=integer
           Integer representing NULL value data cell

       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.colors, d.rast.edit, g.region, r.in.xyz, r.patch, v.in.ascii, wxGUI vector digitizer

AUTHOR

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

SOURCE CODE

       Available at: r.in.poly source code (history)

       Accessed: Monday Apr 01 03:07:37 2024

       Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

       © 2003-2024 GRASS Development Team, GRASS GIS 8.3.2 Reference Manual

GRASS 8.3.2                                                                                    r.in.poly(1grass)