GeoCouch

Integrates directly into Apache CouchDB's architecture, allowing spatial indexes and queries without external services, as shown by the build process that copies configuration files into CouchDB directories.

Provides spatial indexing for geographic coordinates and geometries, enabling fast bounding box searches and proximity filtering, which is core to its key features.

Works with both Apache CouchDB and Couchbase Server, offering flexibility for teams using either NoSQL database, as mentioned in the GitHub description.

Supports various spatial operations like range queries and offsets, enhancing functionality for location-based applications, per the key features list.