Input file name. This parameter is input as:
INP=innam
where "innam" is the input file name.
Output file name. This parameter is input as:
OUT=outnam
where:
"outnam" is the output file name.
The size field is specified with four arguments,
SIZE=(a,b,c,d)
where:
a is the starting line number of the output picture.
b is the starting sample of the output picture.
c is the number of lines, and
d is the number of samples
For example, SIZE=(1,1,40,50)
would create an output picture of size 40 lines by 50 pixels.
The size field can be thought of as a window relative to the output
grid. The first two values offset the window down and to the right
causing the features in the image to move up and to the left.
SL can be used to specify the starting line of the output picture. This is actually a coordinate relative to the output grid, therefore, it offsets the output picture by (SL - 1.) The default for SL is 1.
SS can be used to specify the starting sample of the output picture. This is actually a coordinate relative to the output grid, therefore, it offsets the output picture by (SS - 1.) The default for SS is 1.
NL can be used in conjunction with NS in place of the SIZE parameter to specify the size of the output picture. It simply represents the number of lines for output.
NS can be used in conjunction with NS in place of the SIZE parameter to specify the size of the output picture. It simply represents the number of samples (pixels) for output.
the nah is number of grid cells horizontally, the number of tiepoints across is one larger (nah+1). NAH must be an integer. The default value is 1.
the nav is number of grid cells vertically, the number of tiepoints vertically is one larger (nav+1). NAV must be an integer. The default value is 1.
The TIEPOINT keyword and associated numbers specify the mapping of control points between output and input pictures. The numbers which follow this keyword are in groups of three, one group for each tiepoint. The numbers may be either integer or real. The total number of tiepoint numbers must be 3*(n+1)*(m+1), where n and m are given by the NAH and NAV parameters. Within each group of three numbers describing a tiepoint, the first two numbers give the line and sample coordinates of the tiepoint in the input picture. (The SIZE field, SS, SL have no effect on this location.) The third value (DZ) specifies the amount of (vertical) shift in the DN value at the tiepoint. A positive value indicates an upward DN shift (brighter), and a negative value indicates a downward DN shift (darker). The order in which the tiepoints are specified is left to right within a horizontal row of tiepoints. The horizontal rows are ordered from top to bottom. A major difference between "geomz" and GEOMA formats is that "geomz" tiepoints must be in an evenly-spaced rectangular grid.
The default is to transform all DN values. FIXVAL=0 is commonly used to preserve the outer background of an image so that mosaicking with THESH=0 can be used.
A parameter data set containing the tiepoint parameters. This file should have been written by a program which uses the XVP routines for writing parameter data sets, such as "TIECONM".