Interactive geological map of metropolitan France — 14 regions, ~1 million geological entities from the BD Charm-50 dataset published by BRGM, rendered client-side with MapLibre GL JS and served from regional PMTiles archives. No tile server required.

• 14 regions — Dynamic selector to navigate across metropolitan France
• Geological formations — ICS colors (International Chronostratigraphic Chart), from Precambrian to Quaternary
• Tectonic structures — Faults, folds, and dip points with degree values
• Interactive popups — Notation code, stratigraphic hierarchy, lithology, minerals, and fossils (~110 detected terms)
• Layer controls — Toggle geology, structures, and overlays independently
• Color legend by geological period
• Geological notices — 997 BRGM notice PDFs with page-count badges (full vs. pocket format)
• Local mode — 1:50,000 WMS raster overlay from BRGM with formation identification via BD Charm-50 vectors

BD Charm-50 — Geological map of France at 1:50,000 published by BRGM.

git clone https://github.com/kushiemoon-dev/geo-france.git
cd geo-france
npm install
npm run dev

Server starts at http://localhost:5173. PMTiles files (~838 MB) are downloaded automatically via Git LFS.

npm run build

Static files in dist/ can be served by any web server. A static server with byte-range support is recommended for PMTiles files.

Scripts in scripts/ handle the full per-region conversion:

1. scripts/regions.sh — Region-to-department mapping
2. scripts/convert.sh — Single region conversion (download, reprojection, merge, PMTiles)
3. scripts/convert-all.sh — Runs conversion for all 14 regions

Requirements: gdal, tippecanoe, curl, unzip

cd scripts && bash convert-all.sh

• BRGM — Geological data (BD Charm-50)
• International Commission on Stratigraphy — Chronostratigraphic chart & ICS colors
• data.cquest.org — Open mirror of French public data
• OpenStreetMap contributors — Basemap