NAME

     vel2ndx - Read Velocity Field V(x,z)-Create  Velocity  Index
     Field V(x,z)

SYNOPSIS

     vel2ndx [-Nntap] [-Ootap] [-Cvlist] [-nsns] [-nene] [-rsirs]
     [-reire] [-dxdx] [-dzdz] [-V] [-h]

DESCRIPTION

     vel2ndx will read a velocity field  and  create  a  list  of
     unique  velocities found and use this list to create a velo-
     city index field.  The input to this program is a  USP  for-
     matted velocity field dataset where the samples are interval
     velocities.  The outputs are a file containing a list of the
     velocities and the corresponding indices and a USP formatted
     integer dataset (Format 1) where each sample is an index  to
     the velocity in the velocity list.

  Command line arguments
     -Nntap
          Enter the input velocity field dataset name after  typ-
          ing -N.

     -Ootap
          Enter the output  velocity  index  field  dataset  name
          after typing -O.

     -Cvlist
          Enter the name of the file to contain the list of velo-
          cities and corresponding indices after typing -C.

     -nsns
          Enter the starting trace number after typing -ns.   The
          default is to begin with trace 1 of the input.

     -nene
          Enter the ending trace number after  typing  -ne.   The
          default is to use all of the input traces.

     -rsrs
          Enter the starting record number aftr typing -rs.   The
          default is to begin with record 1 of the input.

     -rere
          Enter the ending record number aftr  typing  -re.   The
          default  is  to  use  all  of the records of the input.
          Generally,  velocity  field  datasets  have  only   one
          record.

     -dxdx
          Enter the trace spacing (feet or meters)  after  typing
          -dx.   This  value  will  be  placed in the output line
          header (Dx1000).  The default is to use the value  from
          the input line header (Dx1000)/1000.

     -dzdz
          Enter the sample spacing (feet or meters) after  typing
          -dz.   This  value  will  be  placed in the output line
          header (Dz1000).  The default is to use the value  from
          the input line header (Dz1000)/1000.

     -V   Enter -V for a verbose printout.

     -h   Enter this option to get online help.  The program will
          terminate after printing this.

SEE ALSO

     velin,  vlmx,  rmsvel,  rmsvlmx,  mxcvel,  ndx2vel,   vtpad,
     vtrsiz, vtvzex, vttd, xsd2vlmx

BUGS

     None known.

AUTHOR

     Mary Ann Thornton

COPYRIGHT

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