Help for POLYREG

PURPOSE

     "polyreg"  performs a rigid transformation of  a  polygon 
     data set to correct for differences in size,  rotation, 
     aspect,   or  skew.   The  correction  is  most  easily 
     specified  by  giving three input tiepoints  and  their 
     corresponding  output  tiepoints.   Alternatively,  the 
     user can specify two tiepoint pairs and give additional 
     information on aspect ratios,  and whether the polygons 
     are to be flipped over.
EXEC STATEMENT FORMAT

     polyreg INP=A OUT=B PARAMS

     where

     INP                 is  the  input data set  containing 
                         the  polygons to be transformed  in 
                         standard VICAR format.
     OUT                 is  the output data set into  which 
                         the  transformed data set is to  be 
                         written.
     PARAMS              is   a  standard  VICAR   parameter 
                         field.   
OPERATION

     "polyreg"  performs  a  linear  transformation  which is then
     applied to the input data set to yield the output data set.

EXAMPLES
       
  1. polyreg INP=LINES OUT=OUT ITIE=(1.,1.,1.,100.,100.,100.)                                OTIE=(1.,100.,100.,100.,100.,1.)
                                               o
     This  rotates the polygon file LINES by 90  and  writes 
     the result in OUT.
Original Programmer:  A. L. Zobrist, 10 June 1976

Current Cognizant Programmer:  K. F. Evans

Revision:  3               		    April 1986
Revision:  4        Made portable for UNIX  March 1995   A. Scop (CRI)

PARAMETERS: