1. A method of generating a data representation of a geographical region as an adjunct to conducting autonomous operations within the region, the method comprising: a) receiving information specifying a plurality of localised zones having operation-defined geographical boundaries within the region; b) receiving heterogeneous data descriptive of the region; c) associating the received data with respective localised zones; d) fusing the received data associated with the localised zones into data representations of the localised zones; and e) integrating the data representations of the localised zones into a common data representation of the geographical region.