Topic:
In the post order listing, what does the SX,CX, etc mean?

Description:
In the post order file listing, if you save data points as an overlay, what you 
see in list is *data points : SX surface_name
  or                        = 1X surface_name
  
  What are the SX and 1X? Have also seen UX and NX. 
        

Solution:
This allows MapView to tell which file it needs to open.  The 'X' indicates it's
an xyz file, you would see 'C" for contours, and 'G' for grids.  The other
letter indicates what type of surface you have.  This same code is also
used in the file type (eg. surface_name.sxyz) and in the object id
(eg. surfamesx).  The table below indicates what these mean :

C  SUFFIXD xref (I : ies, X : IESX)
C     A - I ampl        K - X max ampl    U - X oper        0 - X eff poros
C     B - I depth       L - X min ampl    V - X velo        1 - X 1st deriv
C     C - X fault       M - X top time    W - I velo        2 - X avg energy
C     D - X depth       N - X top depth   X - X int velo    3 - X ac imped
C     E - X top velo    O - I oper        Y - X attr        4 - X bandwidth
C     F - I fault       P - X inst phase  Z - X ampl        5 - X ref het.
C     G - X dom freq.   Q - X inst freq   + - X isopach     6 - X ref int
C     H - I horiz       R - X azim        - - X isotime     7 - X app pol
C     I - X rms ampl    S - X horiz       # - X n zero x    8 - X max mag
C     J - X mean ampl   T - X dip         ~ - X threshold   9 - X avg mag
C
In the example you have both horizon data (SX) and first derivative data(1X).
The other examples refer to the output of grid or xyz operations(UX) and tops in
depth (NX).
 



Last Modified on: 04-DEC-98