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shapely
Manipulation and analysis of geometric objects

Python · 4511 stars

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Convert GEOSException("IllegalArgumentException: ...") to ValueError("...") Open

bug geos

shapely/shapely#2509 · 3 comments · 1 assignee · Opened Sep 17, 2026
`frechet_distance` crashes on Windows with a large LineString Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

shapely/shapely#2508 · 2 comments · Opened Sep 16, 2026
Shapely 2.1.2: Union of a ring of polies incorrectly closes the hole on Windows Open

geos windows

Difficulty 4/5 3-5 days Newbie friendliness 45/100

shapely/shapely#2494 · 5 comments · Opened Aug 25, 2026
Replace softprops/action-gh-release with a local github action Open

ci release

shapely/shapely#2489 · 1 assignee · Opened Aug 6, 2026
`buffer()` with an almost-zero distance removes polygon holes Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

shapely/shapely#2482 · Opened Jul 29, 2026
Documentation: clarify that hausdorff_distance measures vertex-to-polyline distance not polyline-to-polyline distance Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

shapely/shapely#2458 · 1 comment · Opened Jun 24, 2026
Arguments of `box` factory functions are inconsistent Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

shapely/shapely#2441 · 2 comments · Opened May 10, 2026
Raise DimensionError instead of bare ValueError for inhomogeneous coordinate input Open

dimensions

shapely/shapely#2440 · 1 comment · 1 assignee · Opened Apr 25, 2026
`make_valid` parameter inconsistency Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

shapely/shapely#2428 · 4 comments · Opened Mar 31, 2026
Intersection of polygons gives incorrect results, depending on order of arguments Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2426 · 2 comments · 1 reaction · Opened Mar 21, 2026
Running `node` on GeometryCollection with empty polygon causes segfault Open

geos upstream bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

shapely/shapely#2425 · 1 comment · Opened Mar 21, 2026
Return `NotImplemented` from `BaseGeometry` set operation dunders when `other` is an invalid type Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

shapely/shapely#2419 · 1 comment · Opened Mar 5, 2026
2.2.0 release Open

release

Difficulty 5/5 Over a week Newbie friendliness 25/100

shapely/shapely#2413 · 12 comments · 1 reaction · Opened Jan 29, 2026
Polygon didn't have property xy Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

shapely/shapely#2411 · 1 comment · Opened Jan 15, 2026
BUG: passing view and original array to binary method releasing the GIL gives ValueError in multithreading_enabled decorator Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

shapely/shapely#2410 · 1 comment · Opened Jan 14, 2026
Document behavior with respect to Z and M Open

documentation M

Difficulty 4/5 3-5 days Newbie friendliness 45/100

shapely/shapely#2409 · Opened Jan 14, 2026
Inconsistent and Uncontrollable Source for Z and M Values Open

geos M upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2407 · Opened Jan 11, 2026
Order of Geometries in intersection changes interpolation and drops measure value Open

geos M upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 40/100

shapely/shapely#2406 · Opened Jan 11, 2026
Interpolated Z Value Different for Same Location using Different Geometry Types Open

geos upstream bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

shapely/shapely#2405 · Opened Jan 11, 2026
Point (2D) Expands to Point Z on Intersection with LineString ZM Open

geos M upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

shapely/shapely#2404 · Opened Jan 11, 2026
Doctest shapely.constructive.maximum_inscribed_circle fails Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

shapely/shapely#2391 · 1 comment · Opened Dec 27, 2025
BUG: Empty multi-geometries don't support Z dimension Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

shapely/shapely#2390 · Opened Dec 23, 2025
`shapely.intersection` and other functions return vastly wrong results Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

shapely/shapely#2368 · 3 comments · Opened Dec 14, 2025
Offsetting repeats first point if last point is very close Open

geos upstream bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

shapely/shapely#2361 · 3 comments · Opened Dec 9, 2025
Offsetting misses first & last point Open

geos upstream bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

shapely/shapely#2360 · 3 comments · Opened Dec 9, 2025
Error calling unary_union with very niche inputs Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2358 · 8 comments · Opened Dec 4, 2025
Memory- and compute time explosion for maximum_inscribed_circle of nearly degenerate polygon Open

old_geos_in_wheels

Difficulty 4/5 3-5 days Newbie friendliness 38/100

shapely/shapely#2351 · 1 comment · Opened Nov 21, 2025
[REQUEST] Multigeometry Flattening Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

shapely/shapely#2335 · 2 comments · Opened Oct 2, 2025
Bug with MultiLineString oriented_envelope (or minimum_rotated_rectangle) Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

shapely/shapely#2315 · 1 comment · Opened Jul 17, 2025
Incorrect Delaunay Triangulation with shapely.delaunay_triangles on an edge case. Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2314 · 4 comments · Opened Jul 16, 2025
single-sided buffer for LinearRing since 2.1 Open

geos upstream bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

shapely/shapely#2303 · 3 comments · 1 reaction · Opened Jun 9, 2025
Performance regression in v2.1.0 Open

performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2298 · 8 comments · 1 reaction · Opened May 16, 2025
2.1.x releases Open

release

Difficulty 5/5 Over a week Newbie friendliness 20/100

shapely/shapely#2292 · 8 comments · Opened May 2, 2025
Use multi-phase init for the extension module Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

shapely/shapely#2286 · 1 comment · 1 reaction · Opened Apr 28, 2025
LineString.buffer surprising results Open

geos needs test upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2270 · 2 comments · Opened Mar 26, 2025
Voronoi diagram gives wrong polygonization Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2264 · 5 comments · Opened Mar 20, 2025
force_3d does not change nan z to the parameter value Open

documentation

Difficulty 3/5 1-2 days Newbie friendliness 35/100

shapely/shapely#2217 · 1 comment · Opened Feb 11, 2025
Applied to a rectangle `minimum_rotated_rectangle` gives a warning Open

geos upstream bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

shapely/shapely#2215 · 10 comments · 3 reactions · Opened Feb 8, 2025
Error splitting Polygon with LineString that goes to Infinity Open

documentation splitting

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2193 · 1 comment · Opened Dec 13, 2024
Robustness issue when splitting a LineString with a Point Open

enhancement floating point precision splitting

Difficulty 3/5 1-2 days Newbie friendliness 35/100

shapely/shapely#2179 · 14 comments · Opened Nov 14, 2024
Shapely 2.0.x .bounds is very slow for rectangles Open

performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2176 · 4 comments · Opened Nov 1, 2024
shapely.equals is/can be False for exactly the same invalid polygon Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2169 · 1 comment · Opened Oct 7, 2024
Add common methods and properties to `Geometry` type hint Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2166 · 3 reactions · Opened Oct 7, 2024
Affine transformations are not present in API Reference. Open

documentation

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

shapely/shapely#2157 · Opened Sep 21, 2024
Point(NaN, NaN) no longer creates empty point with GEOS >= 3.13 Open

needs discussion

Difficulty 5/5 Over a week Newbie friendliness 30/100

shapely/shapely#2143 · 4 comments · 1 reaction · Opened Sep 13, 2024
Support for Python 3.13 freethreading build Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

shapely/shapely#2137 · 1 comment · 1 reaction · Opened Sep 8, 2024
`shapely.ops.nearest_points` returns points that don't intersect with the input geometries Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

shapely/shapely#2123 · 4 comments · Opened Aug 23, 2024
Version policy Open

needs discussion

Difficulty 5/5 Over a week Newbie friendliness 25/100

shapely/shapely#2119 · 6 comments · Opened Aug 21, 2024
parallel_offset method get the point i dont't want Open

needs info

Difficulty 4/5 3-5 days Newbie friendliness 25/100

shapely/shapely#2091 · 1 comment · Opened Jul 19, 2024
Error when splitting a multilinestring with a multipoint Open

bug splitting

shapely/shapely#2087 · 1 comment · 1 assignee · Opened Jul 12, 2024

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