A method for updating and / or extension of a map data set of a limited environment

A method for updating and / or extension of a map data set of a mobile equipment (3) with environmental sensors (16) traffic, limited area (2), in particular a parking area (2), wherein a current map data set of one within the environment (2) operated mobile means (3) is transmitted, and is used within the device (3) for locating the mobile device (3) within the area (2), at least one property of at least one feature in the area not yet or different contained in the map data set (2 ) descriptive feature data from sensor data from the environment sensors (16) detects the mobile equipment (3) and stored in the (in the mobile devices 3) copy of the map data set are stored, according to which such an extended map data sets (to a central, assigned to the area server apparatus 18) transmitted, where taking into account the new and / or changed properties are fused to an updated map data set.