From R-Trees to Learned Indexes: A Systematic Review of Spatial Indexing Across 2D, 3D and Point-Cloud Geospatial Query Scenarios
Learned indexes are presented as a new direction for spatial data access, yet their transfer to native 3D geospatial and point-cloud tasks remains unclear. Building on existing reviews and benchmarks, this review connects index structures with geospatial application scenarios, query requirements, and benchmark dimensio...