Useful S2 Geometry Links#

Your micro ‘Awesome S2 Geometry’ list. If you have another S2 related link that may be useful here, please open an Issue or PR.

Documentation#

Core documentation of S2 and the S2 cell system.

S2 Geometry: The S2 Geometry homepage.
S2 Cells: Reference S2 documentation on the S2 cell system.
S2 Geometry Concepts: The concepts page of this documentation.
Earth Cube: Description of the face cell mapping in the S2 cell system.
S2 Cell Statistics: Details on the sizes of S2 cells at each level.
Geometry on the Sphere: Presentation on the core concepts of the S2 cell hierarchy.

Mapping and visualisation tools for S2 cells.

Reference and third-party implementations of S2 in various languages.

google/s2geometry: The reference C++ and Python implementation.
google/s2-geometry-library-java: The reference Java implementation.
sidewalklabs/s2sphere: A pure-Python S2 implementation.
golang/geo: A Go implementation of S2.
radarlabs/s2: NodeJS, Javascript and TypeScript bindings for the reference C++ implementation.
mapbox/node-s2: NodeJS/Javascript bindings for the reference C++ implementation.
r-spatial/s2: R bindings for the reference implementation.
s2geometry-d: A D implementation of S2.
s2-geometry-kotlin: A Kotlin implementation of S2.

Users of S2 in general, not just of this library.

Apache Lucene: Used to implement spatial indexing for Apache Solr.
Azure Data Explorer: Used by the geo_point_to_s2cell function.
BigQuery: Used to implement the BigQuery geography functions.
ClickHouse: Used to implement geographical data and indexing.
CockroachDB: Used to implement the spatial indexing.
InfluxDB: Used to implement the Geo package.
MongoDB: Used to implement the 2dsphere indexing.
PhotoPrism: Used to implement photo geocoding.
S2 Users Mailing List: The Google Groups mailing list for S2 users and developers.