1. An apparatus comprising: at least one memory device configured to store an image of a geographical region; and at least one processing device configured to: discretize the image into multiple sub-regions; generate a graph comprising multiple nodes and multiple edges, the nodes representing the sub-regions, the edges coupling related nodes in the graph; and geospatially partition the geographical region by constructing two or more disjoint sets of related nodes in the graph using one or more sets of aggregated data of one or more tracks that are detected in one or more sub-regions, the one or more tracks corresponding to one or more targets in the geographical region.