=== versions ===
python 3.12.0 | numpy 2.5.4 | rasterio 1.5.2 | shapely 2.2.0 | manifold3d 3.5.5 | pyvista 0.49.2

=== Step 1: the route as GPX ===
OSM relation 4080403: 'Pennine Way (Edale to Crowden)', 86 ways -> LineString
read pennine_way_edale_crowden.gpx: 1,733 track points
start 412,283 E 385,971 N | end 406,851 E 399,068 N | length 26.43 km
inside the model area: True

=== Step 2: Environment Agency LIDAR DTM, fetched at 5 m and averaged to 25 m ===
12 WCS tiles -> 2400 x 3200 cells of 5 m | no-data: 0
block mean 5 x 5 -> 480 x 640 cells of 25 m | empty cells filled: 0
elevation 137.7 - 635.8 m

=== Step 3: drape the route on the DEM ===
sampled every 25 m: 1,058 points
lowest 197 m | highest 633 m at 5.9 km (407,902 E 387,059 N)
total ascent 817 m | total descent 830 m

=== Step 4: model scale ===
horizontal scale 1:93,971 | cell on the print 0.266 mm
model 127.4 x 170.0 x 14.6 mm | route 1.2 mm wide = 113 m on the ground
route line: 1,733 -> 808 vertices after a 0.02 mm simplify
route outline: Polygon with 2,391 vertices, 0 holes, area 332.7 mm2

=== Step 5: raised, engraved and inlay solids ===
terrain      1,228,796 triangles | watertight True | oriented True | volume  213.00 cm3
raised       1,259,666 triangles | watertight True | oriented True | volume  213.20 cm3
engraved     1,258,028 triangles | watertight True | oriented True | volume  212.74 cm3
route inlay     46,084 triangles | watertight True | oriented True | volume    0.47 cm3
[booleans and checks: 2.7 s]
engraved + inlay = 213.204 cm3 | raised = 213.204 cm3 | overlap between the two parts 0.0000 mm3
raised - terrain = 199.6 mm3 (route area 332.7 mm2 x 0.6 mm = 199.6 mm3)
route inlay: 1 piece(s)

=== Step 6: write STL and 3MF ===
pennine_way_raised.stl         63.0 MB | 1,259,666 facets | 84 + 50 x facets = file size: True
pennine_way_engraved.stl       62.9 MB | 1,258,028 facets | 84 + 50 x facets = file size: True
pennine_way_route_inlay.stl     2.3 MB | 46,084 facets | 84 + 50 x facets = file size: True
pennine_way_inlay.3mf          11.5 MB | parts: terrain, route

=== figures ===
sections at y = 84.0 mm, route centre x = 51.3 mm, terrain z = 12.1 mm
wrote 01-route-map, 02-elevation-profile, 03-route-sections, 04-stl-preview-inlay, 05-stl-preview-raised-closeup