DATA ADMINISTRATION METHOD

A method is disclosed for administrating large amounts are of data being associated with a spatial entity. The data are organised in layers of data having a mutual relation, primarily defining rules for interacting with other layers of data so as to generate derived layer of data of which one or more are output layers. The computer system represents the output layers to the user by means of a virtual representation of a spatial entity generated by a computer, and the data for generating the layers are administrated by a data communication network. Different sets of data are represented as different layers that interact and are presented to the user as being superimposed on the representation of the geographical entity, the different layers of data may interact so as e.g. to produce a new representation for the user or to initiate actions at systems or items being external to the computer operated by the user.