1. An electronic device comprising: one or more non-transitory computer-readable storage media that store instructions; and one or more processors that execute the instructions to: obtain a first object observation comprising a first object identifier, a first observation time, and a first observation location; obtain a second object observation comprising a second object identifier, a second observation time, and a second observation location; identify a first observing station at the first observation location and associated with the first object observation; obtain a parameter indicating a first observing station type of the first observing station; determine a first geographic area based at least in part on the first observing station type and first observation location, wherein a size of the first geographic area reflects a level of coverage of the first observing station type; associate the first observation with the first geographic area; and associate the second observation with a second geographic area.