7.5. Additional Index Implementations¶
GeoMesa supports additional index formats at runtime, using
Java service providers. To add a new
org.locationtech.geomesa.index.api.GeoMesaFeatureIndexFactory and register your class under
META-INF/services, as described in the
Once an index is registered, it can be enabled through the
SimpleFeatureType user data, as described in
Customizing Index Creation.
Some additional indices are provided out-of-the-box:
7.5.1. S2/S3 Index¶
The S2 and S3 indices are based on the S2 library:
The S2 library represents all data on a three-dimensional sphere (similar to a globe). This makes it possible to build a worldwide geographic database with no seams or singularities, using a single coordinate system, and with low distortion everywhere compared to the true shape of the Earth.
The S2 index is a spatial index, identified by the name
s2. The S3 index is a composite spatial and time index,
identified by the name
s3. The default time period for the S3 index can be configured through the user data
geomesa.s3.interval (see Configuring Z-Index Time Interval for reference).