The role of DBMS in the new generation GIS architecture
نویسندگان
چکیده
Data Types (ADTs). This architecture is more beneficial for the integrity and consistency of the data. This chapter is devoted to the role of DBMS in new generation GIS architecture and focuses on the manner spatial data can be managed, i.e., stored and analysed, in DBMSs. Two important aspects of DBMS functionality are addressed in detail, i.e., spatial models and spatial analysis. Special attention is placed on the third dimension (3D) because of the increased demand for 3D modelling, analysis and presentations in many applications. The discussion in this chapter is restricted only to vector models, i.e., raster models are outside the scope of this chapter. The chapter is organised as follows: Section 8.2 outlines modelling of spatial features in DBMSs, both using geometrical primitives and topological structure. Section 8.3 makes an overview of possibilities to perform spatial analysis in DBMS. Section 8.4 provides case studies and elaborated discussion on topology versus geometry in DBMS. Section 8.5 is devoted to the third dimension. It starts with examples of 3D GIS applications and elaborates on available techniques and new developments required for full 3D support. The chapter ends with a discussion on the role of DBMSs in the new generation GIS architecture considering both data storage and spatial functionality. Frontiers of Geographic Information Technology
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