This tutorial walks through importing a CPT sounding from a .gef file, running the default Robertson 1990 classification, and exporting a typeset PDF — all without leaving the browser.

Before you start

You’ll need:

• An Atlaned account with CPT analysis enabled
• A .gef file from your sounding (we’ll use the bundled example.gef if you don’t have one)

1. Drop the file into a project

Open the project, then drag your .gef onto the Soundings panel. Atlaned parses the header, validates the columns against the GEF spec, and stages the sounding for review.

If the file uses non-standard column names, the importer will surface a mapping dialog. You can save the mapping and re-use it for the rest of the campaign.

2. Review parsed channels

Each channel (qc, fs, u2) is plotted alongside the raw values so you can spot transducer drift or noise before it propagates into your interpretation.

Depth     qc       fs       u2
0.50      1.21     0.018    0.012
1.00      1.84     0.022    0.015
1.50      2.30     0.027    0.018

3. Pick a classification method

Robertson 1990 is the default. You can switch to Robertson 2009, Schneider, or Ramsey from the Method dropdown. Atlaned recomputes in place — no re-import needed.

4. Export

Click Export → PDF for a typeset log, or Export → AGS to send the sounding into a downstream model.

That’s it. The next tutorial covers layer-based bearing capacity.