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Spatial data warehouses and SOLAP: a new GIS technology
Geosciences, mapping day
Jean-Paul KASPRZYK, phd student
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
Introduction: GIS and SOLAP
• GIS : OnLine Transactional Processing (OLTP)– Daily management of spatial data
• Easy update, integrity and no redundancy of the data– Based on transactional databases
• Entity association approach• Easy access to data
• SOLAP : Spatial OnLine Analytical Processing (Bédard, 1997)– Decision support (Business intelligence)
• Archiving temporal dimension– Based on data warehouses
• Multidimensional approach• Easy exploration of the data at different aggregation levels• Integration of large amount of heterogeneous data
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
Multidimensional approach
Fact: offence
Time: year
Time: month
Time: day
SerialOffender address
Commune
Province
Offence Place
Commune
Commune
Province
Offence Place
Commune
Offence Place
Snowflake schema of the criminal data
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
SOLAP Architecture
ETL Data warehouse
Data cube
(SOLAP server)OLAP
SOLAP
Source data
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
Data integration : ETL (extract transform load)
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
OLAP interface : drill down Operation
drill down
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
OLAP interface : drill through operation
drill through
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
OLAP interface: slice operationSlice (time) Slice (serie)
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
OLAP interface: graphic exports
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
SOLAP Interface: spatial drill down (1)
MDX request
SELECT {[Measures].[offence]} ON COLUMNS,{[offence place].[province].members} ON ROWSFROM [offence]
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
SOLAP interface: spatial drill down (2)
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
SOLAP Interface :
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
Conclusion
• Advantages of SOLAP– Integration and exploration of large amounts
of heterogeneous data– Simple interface– Quick requests – Ideal for decision support
• Spatial OLAP = new technologies– spatial operations can still be improved
• Example: buffer operation through the data cube
JP Kasprzyk – Spatial data warehouses and SOLAP: a new GIS technology
October 2011
Thank you for listening
Any question?
