OSNI® Regional 1:50,000 Scale Vector mapping provides clear, detailed information for roads, railways, airports, footpaths, woods, water features, important buildings, historical features and height. The product is derived from data used to create OSNI Discoverer Series and has a cartographic focus.

OSNI® Regional 1:50,000 Scale Vector contains points, lines, polylines and polygons representing real-world features presented in seven themes:

- Settlements
- Transport
- Water
- Vegetation
- Relief (with 10-metre contour intervals)
- Northern Ireland Outline
- Supplemental Text

Typical use cases include environmental impact assessments, land use planning, development, engineering and vehicle routing.

The product is aligned to EPSG: 29900 (TM65 Irish National Grid) and updated on a three-year cycle.

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 which collects, processes and manages land and property information in support of economic and social development in Northern Ireland.