Spatial, Thematic and Temporal Views
Peter J. M. van Oosterom, Bart Maessen, C.W. Quak · Data Archiving and Networked Services (DANS) · 2000
This paper explores the use of database views in the context of a GIS specialized as a geographic query tool for an object-relational database.Data from cadastral systems are used in case study examples.These data include the cadastral map (geometric) data and the land registration (administrative) data.The integration of geometric and administrative data is realized by using views based on joins without changing the original data models.Thematic overview maps are created by aggregate views on the administrative data.Finally, views are used to deal with the time aspect of the spatial-temporal data.This paper shows the power of the relational database view concept, but also indicates some problem areas: manipulating with topologically structured data, traversing hierarchical structures, and handling spatial aggregates.