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- spottopgm(1L) AMIGA spottopgm(1L)
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- NAME
- spottopgm - convert SPOT satellite images to Portable
- Greymap format
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- SYNTAX
- spottopgm [-1|2|3] [Firstcol Firstline Lastcol Lastline]
- inputfile
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- 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.
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- 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.
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- DESCRIPTION
- Spottopgm converts the named inputfile into Portable Greymap
- format, defaulting to the first color and the whole SPOT
- image unless specified by the options.
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- 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.
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- 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.
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- 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.
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- 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.
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- AUTHOR
- Warren Toomey wkt@csadfa.cs.adfa.oz.au
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- Page 1 (printed 12/9/93)
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- spottopgm(1L) AMIGA spottopgm(1L)
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- SEE ALSO
- The rest of the Pbmplus suite.
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- Page 2 (printed 12/9/93)
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