The OSNI Large-scale database consists of 1:1250 and 1:2500 scale vector mapping. This is the highest level of detail available. Data consists of over 100 useable levels, including categorised buildings, roads, water, field boundaries and administration boundaries. All features are recorded as cartographic elements – lines, symbols, text etc. – with related attributes, within a hierarchical framework to categorize them by type of feature. Information is held within a general-purpose digital topographic database. The Data is fully edgematched, multi-attributed, with full links and nodes structure and inclusive of associated textual information, which is fully maintained. The largescale data is a vital component in various applications such as planning and resource management.