Proceedings of the 13th International Conference on Extending Database Technology
The OGC web coverage processing service (WCPS) standard
Geoinformatica
PetaScope: an open-source implementation of the OGC WCS geo service standards suite
SSDBM'10 Proceedings of the 22nd international conference on Scientific and statistical database management
Towards a model for the multidimensional analysis of field data
ADBIS'10 Proceedings of the 14th east European conference on Advances in databases and information systems
Using preaggregation to speed up scaling operations on massive spatio-temporal data
ER'10 Proceedings of the 29th international conference on Conceptual modeling
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OLAP pre-aggregation techniques have proven to enable query time responses close to real-time in business and sta- tistical applications. In raster image databases (such as for geo services), similar data structures and operations appear. However, only one particular, comparatively sim- ple pre-aggregation technique is used there, namely image pyramids. We are working on systematically carrying over results from OLAP to geo raster databases. In this paper we identify a set of fundamental geo raster operations and formulate them algebraically, using a proven array model. We argue that pre-aggregation support for a few basic query patterns is sufficient for many practical situations.