Abstract: A method of presenting construction-related information to a user is provided. The method comprises, at a computing device, receiving a user selection for a construction region, and retrieving image data for one or more construction components that form part of the selected construction region. The method further comprises retrieving construction information defining a construction requirement associated with one or more of the construction components, and rendering a first enhanced construction image that combines the retrieved image data for the construction components with a schematic representation of the construction information. The method may comprise receiving sensor data indicative of a location of the computing device, ascertaining a current location or geographical area of the computing device based on the received sensor data, and retrieving geospatial information associated with both the current location or geographical area and one or more of the construction components.

Abstract: A data versioning system for data which is not highly critical as to the time and date of a change compacts a number of data changes to data objects before storing them in a database as identifiable versions. On output from the database the data for any data object may be produced by mapping from the data object to the actual data required by a third party with the possibility of including different versions of at least some of the data required. The compaction of the changes may be managed to provide a granularity acceptable to the users.