Topic:
How to load an XYZ file from Landmark into IESX

Description:
Zycor grids must be brought into Mapview using the external card file for grid
or XYZ's .
Once gridded and saved in Mapview this surface can be made available in IESX. 

Solution:
An external ASCII XYZ file may be in a User format,but must contain MapView
header cards which describe the data format.
External ASCII Grid and Contour files must be in MapView's internal format.
Please refer to IESX Online Help for detailed information on Mapview ASCII
formats.

Geonet > IESX > Help > Surface Modelling page 219

ASCII XYZ example:
The following example is from a card file for a horizon called MAPVIEW that
contains 3036 data points. The data Z values are time in ms. and the X,Y
location data is in feet.
A 3036 1 13(3E15.7)
MAPVIEW
0.7573547E+03  0.7573547E+03  0.1607415E+04
0.7681310E+03  0.7681310E+03  0.1607341E+04
0.7789074E+03  0.7789074E+03  0.1607678E+04
0.7823537E+03  0.7573545E+03  0.1607413E+04
0.7841320E+03  0.7681318E+03  0.1607349E+04
0.7789084E+03  0.7789072E+03  0.1607676E+04


ASCII grid example:
The following example is from a card image grid file for a surface called
MAPVIEW.The grid node Z values are time in ms.,the X,Y location data is in
feet.There are 14 grid nodes in the X direction and 25 grid nodes in the Y
direction.The grid cell size is 500 X 500 feet,and the azimuth is 45 degrees.

 B 1 1   14   25  0.5000000E+03  0.5000000E+03
 0.8084241E+04  0.2056468E+05 -0.1496744E+05 -0.2487006E+04
 8084.2401955 -10441.9567962     45.00
 MAPVIEW this is the description
 -0.1607593E+04 -0.1583833E+04 -0.1580511E+04 -0.1564354E+04 
 -0.1554195E+04 -0.1535624E+04
 -0.1528643E+04 -0.1514551E+04

To import these files to IESX,from the IESX session manager,select 
  
               Surface Modelling > Mapview
 
1.) Select > Read XYZ points or Read Grid.
    - Select External file and type in path/file, hit return and Exit.
    - Select YES, make current data.

2.) Histogram. (You will not receive histogram edit if reading in a grid)
    - If required you can edit values on the graph and/or Exit.

3.) Select contour icon to display grid and contours.

4.) To save XYZ, grid and contour data:
    Save/Update > Update.
    - Type in surface name or let default.
    - Title optional
    - Toggle z units to appropriate units.
    - Toggle Yes on all options to save.
    - Exit.

5.) To see this data in Seis3DV/2DV and basemap use 'Surface Cuts' to transfer
    the data to the IESX database.
    - Select > Grid
    - Surface Cuts > Cut surface lines
    - For 3D select Inline Range > Select line/cdp range > Select 3D survey that 
      data needs to be transferred to > Exit
    - Save Surface Cuts > IESX Horizon > Edit menu as required > Exit
    - Click on desired colour > Exit bottom right 

On completion Horizon will be available in Seis3DV/3DV and Basemap.



Last Modified on: 12-OCT-98