How to change the contents of files

From: ALEMU Abiy (abiy.alemu@criltelecom.com)
Date: Thu Dec 11 2003 - 06:49:44 EST


I'would like to change the value of the last two parameters of all files in
a directory by making ulxmap=ulxpam-60 and ulymap=ulymap-315. The content
look like this

BYTEORDER M
LAYOUT BIL
NROWS 1000
NCOLS 1000
NBANDS 1
NBITS 16
xdim 100
ydim 100
ulxmap 2200000
ulymap 2700000

Is there a simple way to do this ?

Thanx
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