Having unique references is essential to making the most out of storing data within a relational database management system, as these rely on unique referencing to be able to store, sort, manage, query and retrieve data efficiently. This makes the TOID a robust referencing system that customers can use alongside, or instead of, their own referencing systems and can link to their own information about the feature. This provides a continuity of reference even though a feature may undergo changes. In other words, if a feature changes, the TOID will stay the same as long as it is deemed to be the same feature for example, a house having an extension built is still the same house and fulfils the same purpose. TOIDs will stay the same throughout the life cycle of each feature. This creates fuzzy matching issues between organisations wanting to exchange data for example, will the building St James House be picked up in another system where it is spelt St James' House? This makes it possible to identify any single feature within the dataset without any ambiguity.Ĭurrent referencing systems, such as coordinates and addresses, are subject to interpretation between users. By viewing their infrastructure against the features in OS MasterMap Topography Layer, it will help their crews locate the assets, become familiar with the area before they leave their depot and allow them to provide a better user service by identifying those nearby premises that need to be notified about the works.Įach and every feature within OS MasterMap has the TOID (TOpographic IDentifier) as a unique reference. They frequently need to visit these assets, either for repair, maintenance or to add new assets.
An example would be utility companies that have assets both at surface and below surface level. creating historical views of their area of interestĪ common use for the product is by organisations who have their own GI and wish to examine it in relation to the real world around them.identifying and managing change in their area of interest.using the products in an integrated manner to derive additional information.establishing a common reference between a user’s own datasets and data they may wish to share with other organisations.enhancing the queries that can be run on their data and so providing better information for decision making.achieving consistency and maintainable standards within geographic data holdings.aiding the visual clarity of data and the visual interpretation of data.improving a user’s data capture processes and the accuracy of a user’s own derived data.The user may use the Topography Layer in a wide variety of ways, including:
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