There are 5 repositories under spatial-indexing topic.
Computational geometry and spatial indexing on the sphere
C++ implementation of R*-tree, an MVR-tree and a TPR-tree with C API
Geo Assist is a spatial library to manage spatial data in-memory.
R bindings for H3, a hierarchical hexagonal geospatial indexing system
Ruby Bindings for H3, a hexagonal geospatial indexing system
Spatial data indexing in pure Julia (R*-trees etc)
H3NET: A Hexagonal Hierarchical Geo-spatial Indexing System In C#
Vantage point tree implementation in OCaml
A module to create hexagonal grids on a sphere
Presto bindings for H3, a hierarchical hexagonal geospatial indexing system
Utilites and functions for easy usage of S2 objects (Google geometries abstractions)
Measuring aspects of the H3 hexagonal hierarchical geospatial indexing system.
Spatial decomposition without space filling curves
Compute bounding sphere for a set of points using Jack Ritter's algorithm
Unofficial fork of Norio Katayama's SR Tree spatial indexing implementation for high-dimensional data
R-Tree Data Structure for Spatial Indexing
Hexagonal hierarchical geospatial indexing system in pure Go
[Testing repo for conan-center-index] Conan recipes for libspatialindex