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Spottopgm User Manual(0)			      Spottopgm	User Manual(0)

NAME
       spottopgm - convert SPOT	satellite images to a PGM image

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

OPTIONS
       -1

       -2

       -3     Extract the given	color from the SPOT image.  The	colors are in-
	      frared, visible light, and ultraviolet, although	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.	Unfor-
	      tunately,	 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.

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.

LIMITATIONS
       spottopgm  doesn't  determine  the length of the	input file; this would
       involve two passes over the input file.	It defaults to 3000 lines  in-
       stead.

       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 in-
       frared, visible and ultraviolet.

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

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

SEE ALSO
       pgm(5)

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(0)

NAME | SYNTAX | OPTIONS | PARAMETERS | DESCRIPTION | LIMITATIONS | AUTHOR | SEE ALSO | DOCUMENT SOURCE

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