NAME

     tdfnview  - module to convert from a tdfn format to  an  xsd
     format  such that the xsd file can be plotted with XSD show-
     ing the specific location of each pick.  This is intended to
     show  the  velocity  picks of a tdfn file on a stack of data
     for analysis. This module will also convert from a flat file
     format.  Note, this module will NOT convert a tdfn format to
     xsd format for standard use.

SYNOPSIS

     tdfnview [ -Nntap ] [ -Ootap ]  [  -dtsample  interval  ]  [
     -tracenumber of traces ] [ -recnumber of rec ] [ -S ] [ -P ]
     [ -flat ]

DESCRIPTION

     tdfnview This program creates a XSD file  from  tdfn  format
     for  viewing  on an XSD display.  This is ideal for locating
     velocity picks on a stacked volume or  even  prestack  data.
     The  data  can  be plotted as points or using the -trace can
     dynamically scale the velocity function to  that  number  of
     traces for plotting.

     The user can actually plot the rms values by  first  running
     vomit  and  converting  the  input functions into  rms func-
     tions.  Then using tdfnview, execute with the -trace option.
     The ouptput will be  viewable rms functions.

     tdfnview gets both its data and its parameters from  command
     line arguments. These arguments specify the input, output.

  Command line arguments
     -N ntap
          Enter the input data set name or file immediately after
          typing -N unless the input is from a pipe in which case
          the -N entry must be omitted.  This input  file  should
          include the complete path name if the file resides in a
          different directory.  Example -N/b/vsp/dummy tells  the
          program to look for file 'dummy' in directory '/b/vsp'.

     -O otap
          Enter the output data  set  name  or  file  immediately
          after typing -O.  This output file is not required when
          piping the output to another process.  The output  data
          set also requires the full path name (see above).

     -dt sample interval
          Enter the sample interval (can be a  real  number  e.g.
          12.5) to be written in the header of the output file.

     -trace number of traces
          This option enables the dynmaic range  scaling  of  the
          velocity  funciton  for  plotting.  When this option is
          used, the velocity is dynamically range scaled  to  the
          number  of  traces  so  that the actual function can be
          plotted over either the stack or prestack data.

     -rec number of records
          This option enables the dynmaic range  scaling  of  the
          velocity  funciton  for  plotting.  When this option is
          used, the velocity is dynamically range scaled  to  the
          number  of  records  so that the actual function can be
          plotted over either t.PP

     -S   This option is used to indicate that  the  input  picks
          are  associated with stacked data.  This is the default
          setting and the program will assume stacked data is  -S
          or -P is not on command line.

     -P   This option is used to indicate that  the  input  picks
          are associated with prestack data.

     -flat
          This option indicates that the input picks  is  a  flat
          file format.  The default is TDFN format.

     Discussion

     To simply convert a TDFN file  for  stacked  data:  tdfnview
     -Nfile  -Ofileout  -dt4 .  The program defaults to the basic
     setting for this conversion.  The additional parameters  are
     used  for  displaying  the  picks as a velocity function for
     either stack or prestack data.

BUGS

     Probably somewhere.

SEE ALSO

     vomit

AUTHOR

     James M. Gridley, USP Team, Tulsa OK

COPYRIGHT

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