majortom
An implementation of the ESA Major Tom Grid.
The hot path (generate_grid_cells, cell_from_id, migrate_cell_id) is
implemented in Rust via majortom-rs
and exposed through a PyO3 extension (majortom_eg._native). The public Python
API (shapely polygons, generators) is unchanged.
Installation
Pre-built wheels (manylinux / macOS / Windows):
pip install majortom_eg
From a source checkout (requires a Rust toolchain). Clone or symlink
majortom-rs to
vendor/majortom-rs:
mkdir -p vendor
ln -sfn ../../majortom-rs vendor/majortom-rs # sibling checkout under ../majortom-rs
uv sync
uv run maturin develop --release
Usage
import shapely.geometry
from shapely.io import to_geojson
from majortom_eg import MajorTomGrid, GridCell
# generate an overlapping grid with cells of 320m square
grid = MajorTomGrid(d=320, overlap=True)
# polygon 1/10 of a degree square
my_aoi = shapely.geometry.Polygon(((0., 0.), (0., 0.1), (0.1, 0.1), (0.1, 0.), (0., 0.)))
# iterate of cells returned from generator
for cell in grid.generate_grid_cells(my_aoi):
# do something with cells
print(f'cell id is {cell.id()}')
print(f'cell geom is {to_geojson(cell.geom)}')
Performance
Benchmarks in benches/grid_bench.py (same AOIs as majortom-rs), after
switching the core to Rust (shapely polygons are built lazily on .geom access):
| AOI | Cells (overlap) | Pure Python (before) | Rust-backed Python |
|---|---|---|---|
| Southampton | 225 | ~7.1 ms | ~0.15 ms (~45×) |
| 1° × 1° Maryland | 187,626 | ~5.7 s | ~135 ms (~40×) |
cell_from_id |
— | ~315 µs | ~0.5 µs |
Raw Rust (majortom-rs criterion) is still faster (~12 ms for the 1° case) because
it never crosses the FFI / Python object boundary; the wrap is the right default
for Python callers.
uv run python benches/grid_bench.py
License
majortom is distributed under the terms of the MIT license.
1 maintainer
Metadata
1 maintainer
Release files for majortom-eg 1.1.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Built distributions (wheels)
| File | Actions Reset | |||
|---|---|---|---|---|
| majortom_eg-1.1.0-cp38-abi3-win_amd64.whl | CPython 3.8 | abi3 | Windows x86-64 | Details for majortom_eg-1.1.0-cp38-abi3-win_amd64.whl |
| majortom_eg-1.1.0-cp38-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | CPython 3.8 | abi3 | Linux glibc 2.17+ x86-64 | Details for majortom_eg-1.1.0-cp38-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl |
| majortom_eg-1.1.0-cp38-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl | CPython 3.8 | abi3 | Linux glibc 2.17+ ARM64 | Details for majortom_eg-1.1.0-cp38-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl |
| majortom_eg-1.1.0-cp38-abi3-macosx_10_12_x86_64.macosx_11_0_arm64.macosx_10_12_universal2.whl | CPython 3.8 | abi3 | macOS 11.0+ ARM64, macOS 10.12+ universal2 (ARM64, x86-64), macOS 10.12+ x86-64 | Details for majortom_eg-1.1.0-cp38-abi3-macosx_10_12_x86_64.macosx_11_0_arm64.macosx_10_12_universal2.whl |
Total release size: 1.6 MB
Release files / majortom_eg-1.1.0-cp38-abi3-win_amd64.whl
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