Figure 2.

General representation of a possible standard database data model for core wildlife GPS data. When the GPS device provides coordinates of a location at a specified time, they are uploaded in the database in a table (GPS_raw_data). A device is associated to an animal for a defined time range (table animal_GPS_device, connected to the tables animal and GPS_device with foreign keys, represented by solid arrows in the figure). According to the acquisition time, GPS-based locations are therefore assigned to a specific animal (i.e. the animal wearing the device in that particular moment) using the information of the table animal_GPS_device. Thus, the spatial table animal_location is filled (dashed arrow) with the identifier of the individual, its position (as a spatial object), the acquisition time and the identifier of the GPS device.