|r.in.poly(1grass)||GRASS GIS User's Manual||r.in.poly(1grass)|
r.in.poly - Creates raster maps from ASCII polygon/line/point data files.
r.in.poly input=name output=name [title=phrase] [type=string] [null=integer] [rows=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
- input=name [required]
Name of input file; or "-" to read from stdin
- output=name [required]
Name for output raster map
Title for resultant raster map
Type of raster map to be created
Storage type for resultant raster map
Options: CELL, FCELL, DCELL
FCELL: Single precision floating point
DCELL: Double precision floating point
Integer representing NULL value data cell
Number of rows to hold in memory
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.
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.
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>
. = cat# label L <for linear features>
. = 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).
An area described by four points:
591341.20 4926368.70 = 42 stadium
r.colors, d.rast.edit, g.region, r.in.xyz, r.patch, v.in.ascii, wxGUI vector digitizer
Michael Shapiro, U.S.Army Construction Engineering Research Laboratory
Available at: r.in.poly source code (history)
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© 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual