Extending the map cube operator with multiple spatial aggregate functions and map overlay

The map cube operator for spatial multidimensional databases supports spatial aggregation using geometric union and enables information visualization in maps. In this paper, we propose three extension to the map cube operator. First, support for spatial aggregate functions other than geometric union. Second, support for several spatial aggregate functions simultaneously. Third, support for overlaying the map cube results with maps. In addition, we fix some grammar inconsistencies of this operator. We illustrate our proposed extension and improvements in a case study about crimes.