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NAME - Exports GRASS raster into GDAL supported formats.


raster, export

SYNOPSIS help [-lr] [input=string] [format=string] [type=string] [output=string] [createopt=string[,string,...]] [metaopt=string[,string,...]] [--verbose] [--quiet]


List supported output formats
Region sensitive output
Verbose module output
Quiet module output


Name of input raster map
GIS format to write (case sensitive, see also -l flag)
Default: GTiff
File type
Options: Byte,Int16,UInt16,UInt32,Int32,Float32,Float64,CInt16,CInt32,CFloat32,CFloat64
Name for output file
Creation option to the output format driver. Multiple options may be listed
Metadata key passed on the output dataset if possible


WARNING: This module is superseded and will be removed in future versions of GRASS. Use the much faster r.out.gdal instead. 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").


The set of supported formats written by 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
  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)
  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


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 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.


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


GDAL library

Compile and install GRASS and QGIS with GDAL/OGR Plugin


r.out.arc, r.out.ascii, r.out.tiff


Markus Neteler, ITC-irst, Italy

Last changed: $Date: 2011-11-08 01:42:51 -0800 (Tue, 08 Nov 2011) $

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