NAME

     llxy   - reads E and N coordinates, writes  x,y  coordinates
     for  S  and  R, and maintains consistency between SrcSta and
     SrcLoc.

SYNOPSIS

     llxy [ -Nntap] [ -Ootap] [ -Lntap2] [ -R] [ -nsns] [  -nene]
     [ -rsirs] [ -reire] [ '-?']

DESCRIPTION

     llxy reads a survey report file of  format  (20x,i5,20x,2i8)
     for  SrcSta, E, and N coordinates,  computes x,y coordinates
     for each source  and  receiver  station,  and  imposes  con-
     sistency between si, gi, di and SrcSta.

     LLXY gets data and parameters from command  line  arguments.
     These  arguments  specify the input, the output, the lat-lon
     (E,N) file, first  and  last  record  and  traces  within  a
     record,  and a flag to signify the initial indices increment
     in reverse order to the SrcSta.

  Command line arguments
     -Nntap
          Enter the input data set immediately after typing -N.

     -Ootap
          Enter the output data set immediately after typing -O.

     -Lntap2
          Enter the input coordinate file immediately after  typ-
          ing  -L.   (Note:  strip off the script portion of this
          file leaving only numbers)

     -R   Type -R if si, gi, and di indices increment in  reverse
          order from SrcSta.

     -nsns
          Enter  first  trace  in   record   after   typing   -ns
          (default=1).

     -nene
          Enter  last  trace   in   record   after   typing   -ne
          (default=#tr/record).

     -rsirs
          Enter  first  record  to  process  after   typing   -rs
          (default=1).

     -reire
          Enter  last  reccord  to  process  after   typing   -re
          (default=#records).

     '-?' Enter '-?' to get online help. Program terminates after
          printing this.

BUGS

     ???????????????????????????????

AUTHOR

     Don Wagner, APR, x3281.

COPYRIGHT

     copyright 2001, Amoco Production Company
               All Rights Reserved
          an affiliate of BP America Inc.