Fix shapes that cross the antimeridian. See the documentation for information about the underlying algorithm. Depends on shapely and numpy.
Can fix:
Polygon, MultiPolygon, LineString, and MultiLineString objects__geo_interface__python -m pip install antimeridian
Then:
import antimeridian
fixed = antimeridian.fix_geojson(geojson)
We also have some utilities to create bounding boxes and centroids from antimeridian-crossing polygons and multipolygons. See the documentation for a complete API reference.
Use the cli optional dependency to install the antimeridian CLI:
python -m pip install 'antimeridian[cli]'
antimeridian fix input.json > output.json
Get uv. Then:
git clone https://github.com/gadomski/antimeridian
cd antimeridian
uv sync
We use pytest for tests:
uv run pytest
To build and serve the docs locally:
uv run mkdocs serve
See CONTRIBUTING.md.
FAQs
Fix GeoJSON geometries that cross the 180th meridian
We found that antimeridian demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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