One engine, one mental model

A geospatial engine for Python, written in Rust. gometry replaces the day-to-day stack of Shapely + pyproj + h3-py + s2sphere + rtree with one coherent package — no GEOS, no GDAL, no system PROJ.

Get started User guide

uv add gometry

import gometry as gm

origin = gm.Point(2.2945, 48.8584, crs=4326)
landmarks = {
    "Arc de Triomphe": (2.2950, 48.8738),
    "Louvre": (2.3376, 48.8606),
    "Notre-Dame": (2.3499, 48.8530),
    "Versailles": (2.1204, 48.8049),
}

print("Within 5 km of the Eiffel Tower")
for name, coordinates in landmarks.items():
    distance = gm.distance(origin, gm.Point(*coordinates, crs=4326))
    if distance <= 5_000:
        print(f"{name:<18} {distance / 1_000:>4.1f} km")

Within 5 km of the Eiffel Tower
Arc de Triomphe     1.7 km
Louvre              3.2 km
Notre-Dame          4.1 km

Find Paris landmarks within 5 km of the Eiffel Tower. With EPSG:4326 attached, distance measures the geodesic distance in metres, so the filter works directly in familiar units.

• Explicit Earth model

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  The CRS decides every metric, and the result is native for that CRS. No guessing whether area is degrees² or m², or whether buffer(100) means meters. Geographic coordinates also retain their CRS-native angular units and periodic seam.

  Measurement & the CRS

• Native, vectorized

  ---

  Batched Rust kernels, GeoArrow-compatible interchange, and vectorized array methods. Scalar calls stay a single, ordinary method call.

  Benchmarks

• Grids, indexes, geodesy

  ---

  H3, S2, geohash, and tile covers with explicit cell_rule, spatial indexing, and ellipsoidal geodesics — all on one geometry type.

  Discrete grids

Why gometry

Declare, transform, refine

with_crs labels coordinates; to_crs transforms them. Index candidates and grid cells narrow a search; exact predicates on the source geometry decide membership.

One spelling per operation

Facts are properties, unary operations are methods, and binary relationships are free functions. Find familiar operations in the migration cheatsheet.

Start with what you need

For questions, bug reports, and security disclosures, see Support and the issue tracker.