numpy 2.5.4 | rasterio 1.5.2 | shapely 2.2.0 | manifold3d 3.5.5 | pyvista 0.49.2

=== Step 1: read the stratum surfaces in the print window ===
window 392400-394300 E, 215000-216400 N: 190 x 140 cells of 10 m | model domain covers 89.6% of it
5 units, model base 80 m OD | cells needing re-clamping 0, below the model base (raised to it) 0
  top of SUP   Superficial deposits        134.0 to  295.4 m OD
  top of GOG   Great Oolite Group          127.8 to  294.3 m OD
  top of IOG   Inferior Oolite Group       127.8 to  293.1 m OD
  top of BDS   Bridport Sand Formation     127.8 to  238.7 m OD
  top of LIAS  Lias mudstones (Whitby Mudstone and older)  127.8 to  212.6 m OD

=== Step 2: the footprint of the model domain ===
horizontal scale 1:9,450 | one 10 m cell = 1.06 mm on the print
footprint 2.28 km2 = 255.3 cm2 on the print, 0 hole(s) | 0 smaller piece(s) left out (0 m2)

=== Step 3: print heights, vertical exaggeration x3, nothing thinner than 0.6 mm ===
1 m of ground = 0.317 mm on the print, so 0.6 mm = 1.89 m of strata
SUP   present under  96.0% of the footprint | thinner than 0.6 mm under  48.5% (1,094,700 m2) -> absorbed by the unit below
GOG   present under  26.1% of the footprint | thinner than 0.6 mm under   1.4% (32,400 m2) -> absorbed by the unit below
IOG   present under  75.6% of the footprint | thinner than 0.6 mm under   0.4% (8,200 m2) -> absorbed by the unit below
BDS   present under  80.9% of the footprint | thinner than 0.6 mm under   0.6% (12,800 m2) -> absorbed by the unit below

=== Step 4: cumulative solids and booleans ===
whole model 197.9 x 145.0 x 71.4 mm, including the 3 mm plinth
SUP     4 separate piece(s)
GOG     1 separate piece(s)
IOG     1 separate piece(s)
BDS     1 separate piece(s)
LIAS    1 separate piece(s)

=== Step 5: check every part before writing ===
sum of parts 1450.952 cm3 | ground solid 1450.952 cm3 | difference +0.0000% | pairwise overlap 0.0000 mm3

=== Step 6: write one STL per unit and a colour 3MF ===
file           unit                       triangles     cm3  PLA g  watertight
01_SUP.stl     Superficial deposits          46,676   35.62   44.2  True
02_GOG.stl     Great Oolite Group            24,120   23.63   29.3  True
03_IOG.stl     Inferior Oolite Group         72,058  305.67  379.0  True
04_BDS.stl     Bridport Sand Formation       76,698  172.61  214.0  True
05_LIAS.stl    Lias mudstones (Whitby Mudstone and older)    93,058  913.43 1132.6  True
total                                       312,610 1450.95 1799.2  (solid PLA; at 15% infill a slicer will use much less)
ground_model.3mf 2.9 MB | 5 parts: Superficial deposits, Great Oolite Group, Inferior Oolite Group, Bridport Sand Formation, Lias mudstones (Whitby Mudstone and older)

=== Step 7: previews rendered from the STL files ===
read back 5 STLs: 197.9 x 145.0 x 71.4 mm
figures written: 01-printable-ground-model.png, 02-exploded-view.png, 03-print-layers-section.png, 04-slicer-style-top.png
finished in 6.9 s