Borehole Geology Sections
Borehole logs, sedimentary records, geological cross sections (2D) and 3D lithology models from borehole data in two CSV files (S-JTSK, WGS84, ETRS89)
Borehole Geology Sections turns borehole logs into geological models. Load two CSV files - a table of boreholes (name, X, Y, ground altitude, total depth) and a table of layers (borehole name, depth from, depth to, lithology, optional stratigraphy) - and the plugin shows the boreholes on the map, with coordinates in S-JTSK (EPSG:5514, also when written without the minus sign), WGS84 or ETRS89. Borehole logs: pick one to four boreholes and draw their profiles side by side with a depth ruler and layer descriptions, or draw sedimentary records in which the column width follows the grain size (clay, silt, sand, gravel) and an Index legend lists the rock types; both can be exported to PNG, SVG and PDF, the profiles also show a stratigraphy column and the rocks can be drawn with the FGDC lithologic patterns. 2D cross sections: draw a section line on the map (or use a selected line feature) and the plugin projects nearby boreholes onto it and correlates layers of the same lithology between neighbouring boreholes, with dip-following boundaries, pinch-outs, lateral lithology changes, optional bedrock surface, highlighted boundaries between stratigraphic sequences and user-defined faults. Vertical exaggeration and colours per lithology are adjustable, and sections can be exported to PNG, SVG and PDF. 3D models: build either a grid model (blocks interpolated from the nearest boreholes) or a fence model made of 2D cross sections (chosen manually or generated automatically as N-S and E-W families) as extruded polygon layers, ready to open in the QGIS 3D Map View. Intended for geologists, hydrogeologists and engineering-geology work with borehole data.