This text presents proceedings of the 4th International Symposium on large Spatial Databases held in Portland in August 1995. It includes sections on: spatial data models; spatial data mining; spatial query processing; and multiple representations.

Lossless representation of topological spatial data.- On the desirability and limitations of linear spatial database models.- The quad view data structure — a representation for planar subdivisions.- Discovery of spatial association rules in geographic information databases.- Knowledge discovery in large spatial databases: Focusing techniques for efficient class identification.- Ranking in spatial databases.- Optimal redundancy in spatial database systems.- Accessing geographical metafiles through a database storage system.- Extending a spatial access structure to support additional standard attributes.- Towards a formal model for multiresolution spatial maps.- Multi-Scale partitions: Application to spatial and statistical databases.- Specifying open GIS with functional languages.- Load-balancing in high performance GIS: Declustering polygonal maps.- Implementation of the ROSE algebra: Efficient algorithms for realm-based spatial data types.- A 3D molecular surface representation supporting neighborhood queries.- An inferencing language for automated spatial reasoning about graphic entities.- Inferences from combined knowledge about topology and directions.- 2D projection interval relationships: A symbolic representation of spatial relationships.- Topological relations between discrete regions.- Generating seeded trees from data sets.- Spatial join strategies in distributed spatial DBMS.- Comparison and benchmarks for import of VPF geographic data from object-oriented and relational database files.- Compressing Elevation Data.

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