s2geometry is by google — not by us.
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Indexed Sep 19, 2026 · 2,727 stars at index time. Maintainers: claiming verifies your identity and unlocks a higher assurance tier. Removal requests are honored.
Application · for humans & their agents
s2geometry
unclaimed listingactively maintainedFreeApache-2.0
Computational geometry and spatial indexing on the sphere
by Open Source Community · New publisher
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google/s2geometry is an open-source project by google: Computational geometry and spatial indexing on the sphere. Indexed here so it can be found — not resold.
It is free. Get it from the upstream repository: https://github.com/google/s2geometry
From the project's own README (excerpt, reproduced for discovery under its Apache-2.0 license):
S2 Geometry Library
Overview
This is a package for manipulating geometric shapes. Unlike many geometry libraries, S2 is primarily designed to work with spherical geometry, i.e., shapes drawn on a sphere rather than on a planar 2D map. This makes it especially suitable for working with geographic data.
If you want to learn more about the library, start by reading the overview and quick start document, then read the introduction to the basic types.
S2 documentation can be found on s2geometry.io.
API/ABI Stability
Note that all releases are version 0.x, so there are no API or ABI stability guarantees. Starting with 1.0 we will adhere to SemVer and follow the Google OSS breaking change policy
The Python API is particularly unstable, and it is planned that the SWIGged API will be replaced by a pybind11 version with more Pythonic names and more complete functionality.
Requirements for End Users using Bazel
Build
This bazel build requires Bazel 8 or newer. Builds were tested using C++20 as set in .bazelrc. This setup relies on abseil-cpp and googletest from the bazel central repository as set in MODULE.bazel.
To build and test using bazel, from within s2geometry/src, run:
bazel test "//:"
To build the libary without testing, from within s2geometry/src, run:
bazel build //:s2
Status
All tests enumerated in the BUILD.bazel file pass on x86 machines. On Apple M1, s2loopmeasurestest fails due to a 6% excess accumlated error. This issue may require revision of boringssl or exactfloat.
Requirements for End Users using CMake
We aim to support all platforms supported by the Google foundational C++ support policy CMake >= 3.22 A C++ compiler with C++17 support, such as g++ >= 7.5 or clang >= 14.0.0 Abseil LTS 20260526 (standard library extensions). This…
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01Capabilities
Does
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02Requirements & stack
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Stack
03Community
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Issues 0
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04Trust Passport
Full passport →0/0 automated components pass. An automated score is never a security guarantee.
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05Versions
Full history →| Version | Channel | Released | Notes |
|---|---|---|---|
| 0.0.0 | stable | Sep 19, 2026 | Indexed listing — see the upstream repository for real release history. |