r.out.gdal.sh(1grass)

NAME

r.out.gdal.sh - Exports GRASS raster into GDAL supported formats.

KEYWORDS

raster, export

SYNOPSIS

r.out.gdal.sh
r.out.gdal.sh help
r.out.gdal.sh [-lr] [input=string] [format=string] [type=string] [output=string] [createopt=string[,string,...]] [metaopt=string[,string,...]] [--verbose] [--quiet]

Flags:

-l: List supported output formats

-r: Region sensitive output

--verbose: Verbose module output

--quiet: Quiet module output

Parameters:

input=string: Name of input raster map

format=string: GIS format to write (case sensitive, see also -l flag)
Options: AAIGrid,BMP,BSB,DTED,ELAS,ENVI,FIT,GIF,GTiff,HFA,JPEG,MEM,MFF,MFF2,NITF,PAux,PNG,PNM,VRT,XPM
Default: GTiff

type=string: File type
Options: Byte,Int16,UInt16,UInt32,Int32,Float32,Float64,CInt16,CInt32,CFloat32,CFloat64

output=string: Name for output file

createopt=string[,string,...]: Creation option to the output format driver. Multiple options may be listed

metaopt=string[,string,...]: Metadata key passed on the output dataset if possible

DESCRIPTION

WARNING: This module is superseded and will be removed in future versions of GRASS. Use the much faster r.out.gdal instead. r.out.gdal.sh outputs GRASS raster maps into various GIS formats as supported by GDAL. This script is based on 'gdal_translate', it's parameters are similar to those of ’gdal_translate'. It requires the installation of either GDAL with GRASS support or of the GDAL-OGR-GRASS plugin which is available from the GDAL web site.

For possible metaopt parameters see the 'supported formats' pages of GDAL. The createopt may be used to create TFW or World files ("TFW=YES", "WORLDFILE=ON").

SUPPORTED FORMATS

The set of supported formats written by r.out.gdal.sh depend on the local GDAL installation. Available may be (incomplete list):

AAIGrid: Arc/Info ASCII Grid

BMP: MS Windows Device Independent Bitmap

BSB: Maptech BSB Nautical Charts

DTED: DTED Elevation Raster

ELAS: ELAS

ENVI: ENVI .hdr Labelled

FIT: FIT Image

GIF: Graphics Interchange Format (.gif)

GTiff: GeoTIFF

HDF4Image: HDF4 Dataset

HFA: Erdas Imagine Images (.img)

JPEG2000: JPEG-2000 part 1 (ISO/IEC 15444-1)

JPEG: JPEG JFIF

MEM: In Memory Raster

MFF2: Atlantis MFF2 (HKV) Raster

MFF: Atlantis MFF Raster

NITF: National Imagery Transmission Format

PAux: PCI .aux Labelled

PCIDSK: PCIDSK Database File

PNG: Portable Network Graphics

PNM: Portable Pixmap Format (netpbm)

VRT: Virtual Raster

XPM: X11 PixMap Format

NOTES

When writing out GeoTIFF format for users of ESRI software or ImageMagick, the band interleaving should be switched to pixel interleaving using createopt="INTERLEAVE=PIXEL". Multiple options have to be specified as comma separated list (createopt=TFW=YES,COMPRESS=DEFLATE).

Out of the GDAL data types, the closest match for GRASS CELL, FCELL and DCELL rasters are respectively Int32, Float32 and Float64. These are not exact equivalents, but they will preserve the max possible data range and number of decimal places for each respective GRASS raster data type. Please keep in mind, that not all CELL rasters will require Int32 - e.g., 0-255 CELL raster are covered by the Byte type as well. Moreover, some GDAL-supported formats do not support all the data types possible in GDAL and GRASS. Use r.info to check the data type and range for your GRASS raster, refer to specific format documentation (GDAL website, format vendor's docs) and e.g. the Wikipedia article Typical boundaries of primitive integral types for details.

EXAMPLE

Export of the map 'elevation.dem' from the Spearfish data set:
r.out.gdal.sh elevation.dem format=GTiff type=Int16 output=elev_dem.tif

REFERENCES

GDAL library

Compile and install GRASS and QGIS with GDAL/OGR Plugin

AUTHOR

Markus Neteler, ITC-irst, Italy

Last changed: $Date: 2011-11-08 10:42:51 +0100 (Tue, 08 Nov 2011) $

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