TCL/TK packing Post: 302487006

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LEARN ABOUT REDHAT

spottopgm

spottopgm(1L)															     spottopgm(1L)

NAME

       spottopgm - convert SPOT satellite images to Portable Greymap format

SYNTAX

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

OPTIONS

       -1|2|3  Extract	the  given  colour  from  the SPOT image. The colours are infra-red, visible light and ultra-violet, although I don't know
	       which corresponds to which number. If the image is in colour, this will be announced on standard error. The default colour is 1.

       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.  Unfortu-
	       nately  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

       Spottopgm converts the named inputfile into Portable Greymap format, defaulting to the first color and the whole SPOT image  unless  speci-
       fied by the options.

INSTALLATION

       You  must  edit	the  source program and either define BIG_ENDIAN or LITTLE_ENDIAN, and fix the typedefs for uint32_t, uint16_t and uint8_t
       appropriately.

BUGS

       Currently spottopgm doesn't determine the length of the input file; this would involve two passes over the input file. It defaults to  3000
       lines instead.

       Spottopgm  could  extract  a  three-color  image (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 infra-red, visible and ultra-violet.

       I've only had 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

       The rest of the Pbmplus suite.

																     spottopgm(1L)

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