Digital representation of topographic map features with attributed points, lines, and polygons with complete coverage of Northern Ireland. Vector data is surveyed at 1:2500 scale in rural areas and more detailed 1:1250 scale in urban areas.

Ordnance Survey of Northern Ireland (OSNI) is the official producer of geographic mapping for Northern Ireland. OSNI is part of Land & Property Services (LPS) within the Department of Finance and collects, processes and manages land and property information in support of economic and social development in Northern Ireland.