Currently, all projections are re-projected to EPSG:4326.

Capture configuration for ingesting data to create an index with a given projection. Data is reprojected to the indicated projection IF the data is not already represented by the configured projection.

Indices CAN NOT mix projections. Thus, meta-data associated with each index includes the projection. New indices are created where necessary to handle data in different projections.
For example, SPATIAL_IDX_4326, SPATIAL_IDX_3413