Simply put, a Geographical Information System combines and visualises spatial layers of information about a place to give you a better understanding of events at that location. What layers of information you combine depends on your purpose - finding the best location for a new store, analysing environmental damage, viewing similar crimes in a city to detect a pattern, and so on.

Case Studies
Ordnance Survey of Northern Ireland
ESRI Case Study
Ordnance Survey of Northern Ireland

OSNI's mission is to contribute to the public good by supplying the mapping information for Northern Ireland.

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