Manual: spottopgm

Spottopgm User Manual(1)			   General Commands Manual			    Spottopgm User Manual(1)

NAME
       spottopgm - convert SPOT satellite images to a PGM image

SYNOPSIS
       spottopgm [-1|-2|-3] [Firstcol Firstline Lastcol Lastline] inputfile

DESCRIPTION
       This program is part of Netpbm(1).

       spottopgm  converts  the named inputfile to PGM format, defaulting to the first color and the whole SPOT image unless
       you specify otherwise with the options.

OPTIONS
       In addition to the options common to all programs based on libnetpbm (most notably  -quiet,  see	  Common Options  ),
       spottopgm recognizes the following command line options:

       -1

       -2

       -3     Extract  the  given  color  from the SPOT image.	The colors are infrared, visible light, and ultraviolet, al‐
	      though I don't know which corresponds to which number.  If the image is in color, spottopgm announces this  on
	      Standard Error.  The default color is 1.

PARAMETERS
       Firstcol Firstline Lastcol Lastline
	      Extract  the  specified  rectangle from the SPOT image.  Most SPOT images are 3000 lines long and 3000 or more
	      columns wide. Unfortunately, the SPOT format only gives the width and not the length.  The width is printed on
	      standard error.  The default rectangle is the width of the input image by 3000 lines.

LIMITATIONS
       spottopgm doesn't determine the length of the input file; this would involve two passes over the input file.  It	 de‐
       faults to 3000 lines instead.

       spottopgm  could	 extract  a three-color image (as a PPM), but I didn't feel like making the program more complicated
       than it is now.	Besides, there is no one-to-one correspondence between red, green, blue and  infrared,	visible	 and
       ultraviolet.

       I've  had  only a limited number of SPOT images to play with, and therefore wouldn't guarantee that this will work on
       any other images.

AUTHOR
       Warren Toomey wkt@csadfa.cs.adfa.oz.au

SEE ALSO
       pgm(1)

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

	      http://netpbm.sourceforge.net/doc/spottopgm.html

netpbm documentation					22 July 2004				    Spottopgm User Manual(1)