Full workflow¶

Sequence of a real geological section, from input to report.

Overall scheme¶

INPUT                          PROCESSING                OUTPUT
─────                          ──────────                ──────
1. Boreholes (coords +       4. Projection on trace      6. 2D section
   stratigraphy)             5. Horizon interpolation    7. Soil table
2. Section trace                                         8. Water table
   (polyline on map)                                     9. SVG / DXF / PDF
3. (optional) Water table
   per borehole

1. Boreholes¶

Create a borehole: Add borehole → coordinates (lat/lon or E/N) + ground-level elevation + stratigraphy.

Layer stratigraphy¶

Field	Meaning
Top depth (m)	Top of layer below ground level
Bottom depth (m)	Base of layer
Lithology	Description (e.g. "silty sand")
Symbol	Standard geological symbology (ISO 14689 / UNI 7029)
Colour	Auto from lithology, override possible
Notes	Free text (ISRM parameters, tests, …)

Water table¶

Water-table depth at the time of drilling (m below ground level). Optional — without it, the section won't draw the water-table line.

Core photos¶

For each borehole you can attach photos (core boxes, hand-drawn geological profiles, etc.). Photos are included in the final PDF.

2. Section trace¶

Map → Polyline tool → click trace points (start and end usually; intermediate points if the section "bends").

The trace renders with direction arrows + naming A-A', B-B', etc.

Typical length: 50-500 m for building sections, 0.5-5 km for microzonation.

3. Generate section¶

Click Generate section:

Project each borehole on the trace (compute progressive distance = position along the polyline).
Lift to ground-level elevations.
Draw the vertical columns for each borehole (with coloured layers).
Interpolate stratigraphic horizons between adjacent boreholes (linear by default).
Draw the water table as a blue line.
Generate the soil table below the section.

Vertical exaggeration¶

A section typically has vertical exaggeration (e.g. 1:5, 1:10) so layers are better visible on long traces. Configurable in Section options.

4. Edit the section¶

On the generated section you can:

Drag horizons to correct the auto-interpolation.
Add annotations (text, arrows, symbols).
Edit colours or pattern of a soil.
Add/remove boreholes on the fly.

5. Soil table¶

Below the section, a summary table of the represented soils:

Symbol	Lithology	Depth from-to (m)	Notes
░░	Silty sand	0.0 - 4.5	Saturated below -2.5 m
▓▓	Stiff clay	4.5 - 12.0	OCR ≈ 1.5

6. Export¶

Toolbar → Export:

SVG — open vector format (Inkscape, Illustrator, web).
DXF — vector for desktop CAD (AutoCAD, BricsCAD, ...).
PDF — paginated report: title, section, table, legend, photos.

Recap diagram¶

flowchart TD
    A[Boreholes: coords + stratigraphy] --> B[Section trace]
    B --> C[Generate section]
    C --> D[Borehole projection]
    C --> E[Horizon interpolation]
    C --> F[Water table]
    D & E & F --> G[2D section]
    G --> H[Soil table]
    G --> I[Manual edit]
    I --> J[Export SVG/DXF/PDF]

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