r.out.ppm(1)		      Grass User's Manual		  r.out.ppm(1)



NNAAMMEE
       rr..oouutt..ppppmm  -  converts  a  GRASS raster file to a PPM image file at the
       pixel resolution of the CURRENTLY DEFINED REGION.



UUssaaggee::
       rr..oouutt..ppppmm [-qG] iinnppuutt==name oouuttppuutt==name

FFllaaggss::
       -q   Run quietly


       -G   Output greyscale instead of color



PPaarraammeetteerrss::
       input   Raster file to be converted.


       output	Name for new PPM file. (use out=- for stdout)

       default: .ppm




       This program converts a GRASS raster file to a PPM image  file  at  the
       pixel  resolution  of  the  CURRENTLY DEFINED REGION.  e.g., to get the
       resolution of the raster map, do:


       g.region rast=[mapname]


       before running r.out.ppm.


       The PPM file created is 24bit color, rawbits storage by default.  Using
       -G,  you  may  force  r.out.ppm	to  use  8bit  greyscale instead.  The
       greyscale conversion uses the NTSC conversion:


       Y = .30*Red + .59*Green + .11*Blue


       One pixel is written for each cell value, so if ew_res and ns_res  dif-
       fer, the aspect ratio of the resulting image will be off.



NNOOTTEE
       A  few  ppm  file  comments  are written - the name of the GRASS raster
       file, resolution, etc.  Although these are perfectly legal, I've  found
       one  PD image utility that chokes on them, so if you need a commentless
       ppm file, use out=- > outfile.ppm. (When sending output to  stdout,  no
       comments are written.)



TTOODDOO
       Allow  combination of 3 grass files to represent R, G, B components  of
       ppm file?  Bill Brown

       _L_a_s_t _c_h_a_n_g_e_d_: _$_D_a_t_e_: _2_0_0_2_/_0_1_/_2_5 _0_5_:_4_5_:_3_4 _$



GRASS 5.0							  r.out.ppm(1)
