A Julia package that converts geospatial data into Gmsh geometry (.geo) and mesh (.msh) files. Built on the JuliaGeo ecosystem — GeoInterface, GeometryOps, Proj, ArchGDAL — and accepts any GeoInterface-compatible source: Shapefiles, GeoJSON, GeoPackage, GeoParquet, NaturalEarth data, or raw geometries.

Flat 2D meshes from any geospatial boundary:

Iberian Peninsula	Catalonia	Australia — geometry	Australia — mesh

3D terrain manifolds by sampling a Digital Elevation Model at every mesh node:

Mont Blanc	Everest

• Universal reader — load any geospatial format (Shapefile, GeoJSON, GeoPackage, GeoParquet, …) through a single read_geodata call backed by GDAL. Read directly from ZIP archives via /vsizip/.
• Reproject — convert between coordinate systems via Proj.jl (e.g. geographic degrees → UTM metres).
• Simplify — MinEdgeLength removes short edges; AngleFilter suppresses zig-zag spikes; compose algorithms with ∘.
• Segmentize — subdivide long edges to control maximum element size.
• Rescale — normalise geometry into a dimensionless bounding box so mesh_size is consistent.
• 3D terrain — lift a 2D mesh to terrain elevation by sampling a DEM raster at every node.
• Output — .geo script or .msh file via the Gmsh API; linear/quadratic elements, triangle or quad recombination.

using Pkg
Pkg.add(url = "https://github.com/JordiManyer/GeoGmsh.jl")

using GeoGmsh, NaturalEarth

# No files needed — NaturalEarth.jl provides built-in country boundaries
countries = naturalearth("admin_0_countries", 110)

geoms_to_msh(countries, "france";
  select       = row -> get(row, :NAME, "") == "France" && row.ring == 1,
  target_crs   = "EPSG:3857",
  simplify_alg = MinEdgeLength(tol = 5_000.0),
  bbox_size    = 100.0,
  mesh_size    = 2.0,
)
# → france.msh

using GeoGmsh

# 3D terrain mesh from a bounding box + DEM
geoms_to_msh_3d("bbox.geojson", "dem_utm.tif", "terrain";
  target_crs   = "EPSG:32632",
  simplify_alg = MinEdgeLength(tol = 500.0),
  mesh_size    = 500.0,
)
# → terrain.msh  (node z-coordinates sampled from DEM)

See the documentation for the full pipeline guide, API reference, and worked examples.

• Natural Earth: naturalearthdata.com — free vector map data.
• NUTS: Eurostat / GISCO, © European Union.
• ASGS Edition 3: Australian Bureau of Statistics.
• Copernicus GLO-30 DEM: © DLR / Airbus.