GRASS GIS 6.2.4cvs Reference Manual

Geographic Resources Analysis Support System, commonly referred to as GRASS, is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.

This reference manual details the use of modules distributed with Geographic Resources Analysis Support System (GRASS), an open source (GNU GPL'ed), image processing and geographic information system (GIS).

Quick Introduction

raster3D commands:

r3.cross.rast Creates cross section 2D raster map from g3d raster volume map based on 2D elevation map

r3.in.ascii Convert a 3D ASCII raster text file into a (binary) 3D raster map layer

r3.in.v5d import of 3-dimensional Vis5D files (i.e. the v5d file with 1 variable and 1 time step)

r3.info Outputs basic information about a user-specified 3D raster map layer.

r3.mapcalc

r3.mapcalculator r3.mapcalculator - Calculates new grid3D volume from r3.mapcalc expression

r3.mask Establishes the current working 3D raster mask.

r3.mkdspf Creates a display file from an existing grid3 file according to specified threshold levels.

r3.null Explicitly create the 3D NULL-value bitmap file.

r3.out.ascii Converts a 3D raster map layer into an ASCII text file

r3.out.v5d Export of GRASS 3D raster file to 3-dimensional Vis5D file.

r3.out.vtk Converts 3D raster maps (G3D) into the VTK-Ascii format

r3.timestamp print/add/remove a timestamp for a 3D raster map

r3.to.rast Converts 3D raster maps to 2D raster maps

r3.cross.rast	Creates cross section 2D raster map from g3d raster volume map based on 2D elevation map
r3.in.ascii	Convert a 3D ASCII raster text file into a (binary) 3D raster map layer
r3.in.v5d	import of 3-dimensional Vis5D files (i.e. the v5d file with 1 variable and 1 time step)
r3.info	Outputs basic information about a user-specified 3D raster map layer.
r3.mapcalc
r3.mapcalculator	r3.mapcalculator - Calculates new grid3D volume from r3.mapcalc expression
r3.mask	Establishes the current working 3D raster mask.
r3.mkdspf	Creates a display file from an existing grid3 file according to specified threshold levels.
r3.null	Explicitly create the 3D NULL-value bitmap file.
r3.out.ascii	Converts a 3D raster map layer into an ASCII text file
r3.out.v5d	Export of GRASS 3D raster file to 3-dimensional Vis5D file.
r3.out.vtk	Converts 3D raster maps (G3D) into the VTK-Ascii format
r3.timestamp	print/add/remove a timestamp for a 3D raster map
r3.to.rast	Converts 3D raster maps to 2D raster maps