build_circle
CPT AGS Thinning

Reduce SCPT data volume in AGS files while preserving stratigraphy.

What this tool does

Reduces the data volume of SCPT records inside AGS 4.0 files using Douglas–Peucker line simplification with local min/max locking. Stratigraphy and exact channel peaks (qc, fs, u2) are preserved while the point count — and file size — drop substantially. Every non-SCPT group (LOCA, PROJ, …) and every SCPT column on retained rows is passed through unchanged.

Presets
  • Conservative — Highest fidelity (~30-35% reduction); keeps fine detail, best for liquefaction / thin-layer analysis. (qc 0.1 MPa, fs 5.0 kPa, u2 8.0 kPa)
  • Standard — Recommended default (~35-45% reduction); preserves all stratigraphy. (qc 0.2 MPa, fs 10.0 kPa, u2 15.0 kPa)
  • Aggressive — Smallest file size (~40-55% reduction); good for data warehousing / web platforms / overview use. (qc 0.35 MPa, fs 20.0 kPa, u2 30.0 kPa)

Douglas, D.H. & Peucker, T.K. (1973). Algorithms for the reduction of the number of points required to represent a digitized line or its caricature. Cartographica, 10(2), 112–122.

AGS (2017). Electronic Transfer of Geotechnical and Geoenvironmental Data, Edition 4.0.4. Association of Geotechnical and Geoenvironmental Specialists.

Upload your CPT data

Drop one or more AGS 4.0 files to reduce SCPT data volume while preserving stratigraphy and channel peaks.

cloud_upload
Drop AGS file(s) here
or click to browse · multiple files · 25 MB max each

    Reduction preset

    compress
    Your thinned CPT results will appear here

    Upload AGS file(s), pick a reduction preset, then choose “Thin AGS” to shrink SCPT data volume while keeping the stratigraphy.