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Database Rebuild

You need to rebuild your database whenever you add or remove data from your project directory. WinPICS automatically checks if project files are up-to-date when you open a project. If WinPICS finds a change in your project, you will receive a message warning you to rebuild the project.

The rebuild function finds intersection locations for 2D lines, creates a text file containing line locations and intersections, produces a decimated coordinate file (for quick map displays), and updates the horizon definition table (database). You can select which of these functions are performed each time you rebuild.

Rebuilding the Database

1. From the Application toolbar, click and select Rebuild Selected Project. The Map window must be active in order to select this option.
2. Select the rebuild functions for Line Intersections:

• Rebuild for All Lines – Recalculates intersections for the entire project.
• Rebuild for New Lines – Calculates intersections for new data only.
• Do Not Rebuild – Select this option if you are only performing a line decimation and/or horizon rebuild.
• Intersection Tolerance – Sets the maximum distance for an intersection in UTMUniversal Transverse Mercator map units. WinPICS looks for shotpoints on other lines that are within a radius of the shotpoint of interest. This radius is equal to the intersection tolerance. Shotpoints further away then the intersection tolerance are considered to part of non-intersecting lines.
• Multiple Intersections with Lines – Allows more than one intersection between two seismic lines. Enable this option when you have seismic lines that are not straight. This option slows the rebuild calculation. If you disable this option, only one intersection between any two lines will be found.

3. Select the rebuild functions for Line Decimation:

• Decimate for All Lines – Creates new decimated coordinate files for entire project.
• Decimate for New Lines – Creates decimated coordinate files for new data only.
• Do Not Decimate – Select this option if you are only rebuilding intersections and/or horizons.
• Decimate Tolerance – Controls the length of line segments drawn on map displays and plots. For straight lines the default of ‘20’ is appropriate. Set a smaller decimation for better representation of curved lines.

4. Select Rebuild Horizon Database to scan all 2D and 3D pick files for horizon information and update or create a horizon definition table (horzdefn.db). If a current horizon definition table exists, it will be updated without changing current settings. If no table exists, it will be created assigning default colors and a ‘Peak’ event type.
5. Click <Apply> or <Cancel> to rebuild the database.

• If WinPICS displays a warning that reads "Can not delete old *.DXY file", then browse to your project folder and make sure read-only status is removed from the *.DXY files.

Options

• Place a check mark in the box next to Pics Xing Report to create a text file listing each 2D line and the trace locations for line intersections. Each time you recalculate line intersections this file is overwritten. Use a text editor (such as Notepad) to read this file.
• The Create WinPICS 3.X Line Intersection option provides backward compatibility with WinPICS 3.X versions.

What do you want to do?

• Check project intergrity