Open topic with navigation

3D Import from Trace Header

This is the easiest method to import 3D, as WinPICS reads the X/Y coordinates and the in-lines/cross-lines directly from the trace header.

• To use this method, make sure that your trace header includes your X/Y, in-lines, and cross-lines.

Follow these steps to import the 3D data:

1. Select the <3D Import: XY-Coordinates, In-lines, Cross-lines in Trace Header> button. View image

2. Once you select this option, the <Leave Dead Traces> button will appear. By assumption, dead traces have incorrect trace headers, so WinPICS interpolates X/Ys for the dead traces. Click this button to drop dead traces (the button will change to read <Drop Dead Traces>). The dropped traces will remain in your SEG-Y file, but WinPICS will not display them on your seismic.

• If you plan to import additional processing versions, do not drop dead traces.

3. Select the Convert Coordinates check box if you want to modify the projection or datum information (For example, if you want to covert the data from NAD27 to NAD83).
4. Type parameters into the Change of Trace to Trace Distance Tolerance field and the Cross-Line Min. Acceptable Bin Size field, as appropriate. The defaults are usually acceptable.
5. Click <Next> to proceed to the Import Wizard Step 2 of 3: 3D XY Coordinate, In-Line, and Cross-Line Import Properties dialog box. View image

• If you selected the Convert Coordinate check box, the Project Conversion Parameters dialog box will open before this next window so that you can apply the coordinate conversion.

6. Most options in this dialog box appear dimmed because WinPICS reads the X/Y coordinates and in-lines/cross-lines directly from the trace header. Check that all parameters are correct.

• If you want to re-label in-lines and cross-lines, click <Back>. If the coordinates are incorrect or are from another coordinate reference system, click <3D In-Line/Cross-Line Import - In-Lines/Cross-Lines are in Trace Header>. If neither set of information is usable, click <3D Rectangular Import - Do Not Use Trace Header>, in which case your file must be padded to be rectangular.

7. If necessary, click <Advanced 3D Import Options> to configure additional options for your import.
8. Click <Process 3D Coordinate Import> to import your coordinates.

• You can view the import process on the Status bar at the bottom of the dialog box. When the import completes, this bar will read 3D Import Done.

9. Click <Preview Map Location> to view your 3D data's coordinate locations in the Map window.
10. Click <Next> to proceed to the Line Intersections and Seismic Import Properties dialog box.

What do you want to do?

• Use an advanced 3D import option
• Set your line intersection and seismic import properties
• Select your coordinate import options