Information How to integrate elevation data in SeisImager?

🧭 How to Import Geophone Elevation Data into Plotrefa

If you have measured relative or absolute geophone elevations, you can incorporate these into your velocity model in Plotrefa to produce more geologically realistic results.

📄 Step 1: Prepare the Elevation File

Create an ASCII text file with two columns:

The left column contains geophone horizontal positions (in meters or feet).

The right column contains the corresponding elevation values.

Example:

0.0 100.0
5.0 101.2
10.0 101.5
...
100.0 89.0

✅ Tip: While it’s recommended to have an elevation for each geophone, it’s not strictly required. Plotrefa will interpolate missing elevations as needed.

📥 Step 2: Import the Elevation Data

1. Open Plotrefa.

2. From the top menu, go to:
   Velocity model > Import elevation data file

3. Navigate to your file and double-click it to import.
   📌 Note: There is no default file extension, so ensure your file is visible in the dialog.

4. The elevation profile will now display alongside your data.

🎯 Step 3: Interpret Your Data

Once your elevation profile is imported:

Proceed with your velocity modeling or time-term inversion.

The resulting velocity model will be drawn relative to the elevation profile, accounting for topography.

Example Outputs: