Presentation on theme: "Avencia10 March 2004 Analysis Cubes: Building a Spatial OLAP Engine for Analyzing Crime Steve Meyer Robert Cheetham."— Presentation transcript:
Avencia10 March 2004 Analysis Cubes: Building a Spatial OLAP Engine for Analyzing Crime Steve Meyer Robert Cheetham
Avencia10 March 2004 Overview OLAP = Online Analytical Processing Sits on top of transactional database Aggregates information to higher level of abstraction Help to ask complex summary questions Summarizes data into dimensions Most dimensions have hierarchy (year, month, day hour) or groups (robberies w/ a gun) Data structure is often called a cube, but isnt limited to 3D Designer creates measures (28-day moving average) Important foundation for data mining Add-on for most major RDBMS vendors
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