Seismic Survey File Guidelines

You can use a survey file to import 2D SEG-Y X/Y coordinates or shotpoints data into your project; however, your survey file must follow these guidelines:

Survey files must be in UTMUniversal Transverse Mercator or State Plane coordinates. WinPICS does not support latitude/longitude coordinates. All data in a project must use the same coordinate system.
Units can be meters or feet.
WinPICS can read column-, white-space-, and symbol-delimited ASCII files.
Scale factors and biases can be used to write shotpoints and X/Y coordinates.
Format files can be defined to skip header lines in the survey file.
Survey files can contain data for multiple 2D lines as long as lines follow each other without interruption (only one header is allowed).
Survey files don't need shotpoints or X/Y coordinates for every trace if you select the Match by Shotpoint option. If a survey file contains every second X/Y, the wizard will use the shotpoints found in the trace headers, find matching shotpoints in the survey file, and interpolate or extrapolate to provide X/Ys. Every shotpoint in the survey file must have a corresponding X/Y value.
If you have X/Ys in your survey file but no shotpoints, select the Match by Trace option. The first record in the survey file will be assigned to the first trace of the SEG-Y file, and so on. The survey file must have an entry for every trace and files must match exactly.

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