ABSTRACT
Recent years have witnessed major changes in the geographic information (GI) market, from interoperable technological offerings to national spatial data infrastructures, Web-mapping services, and mobile applications. The arrival of new major players such as Google, Microsoft, Nokia, and TomTom, for instance, has created
3.1 Introduction ....................................................................................................46 3.2 Key Concepts and Architectures for Data Warehouses .................................. 47
3.2.1 Data Warehouse ..................................................................................48 3.2.2 Multidimensional Data Structure ....................................................... 51 3.2.3 Data Mart ............................................................................................ 53 3.2.4 Online Analytical Processing (OLAP) ...............................................54 3.2.5 Data Mining ........................................................................................ 55 3.2.6 Data Warehouse Architectures ........................................................... 56
3.3 Spatial Data Warehousing .............................................................................. 58 3.3.1 Spatial Data Cubes ............................................................................. 59 3.3.2 Spatial Dimensions .............................................................................60 3.3.3 Spatial Measures ................................................................................. 63 3.3.4 Spatial ETL ......................................................................................... 63 3.3.5 Spatial OLAP Operators .....................................................................64
