NAME

       r.out.png  - Export a GRASS raster map as a non-georeferenced PNG image.

KEYWORDS

       raster, export, output, PNG

SYNOPSIS

       r.out.png
       r.out.png --help
       r.out.png  [-tw]  input=name  output=name  [compression=integer]   [--overwrite]  [--help]
       [--verbose]  [--quiet]  [--ui]

   Flags:
       -t
           Make NULL cells transparent

       -w
           Output world file

       --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 raster map

       output=name [required]
           Name for new PNG file (use ’-’ for stdout)

       compression=integer
           Compression level of PNG file
           (0 = none, 1 = fastest, 9 = best)
           Options: 0-9
           Default: 6

DESCRIPTION

       r.out.png exports a GRASS GIS raster map in non-georeferenced  Portable  Network  Graphics
       (PNG) image format, respecting the current region resolution and bounds.

       Optionally  the  user  can  choose  to  export  a  World  File  (.wld)  to  provide  basic
       georeferencing support. When used with the transparency flag this can create images useful
       for  KML,  TMS,  or WMS overlays. (e.g. for use in Google Earth or as OpenLayers tiles) If
       output is redirected to stdout, the world file will be called png_map.wld.

EXAMPLE

       The example is based on the North Carolina sample data location.

       Export of the soil map to PNG format with world file:
       g.region raster=soils_Kfactor -p
       # export PNG file with additional world file
       r.out.png input=soils_Kfactor output=soils_Kfactor -w
       # verify
       gdalinfo soils_Kfactor.png

SEE ALSO

        r.out.gdal, r.out.ppm, r.out.ascii, r.import

AUTHORS

       Alex Shevlakov
       Hamish Bowman

SOURCE CODE

       Available at: r.out.png source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual