OSNI® 1:50,000 Scale Raster is mid-scale georeferenced mapping of Northern Ireland providing detailed georeferenced information on roads, footpaths, woods, water features, important buildings and height contours.

OSNI® 1:50,000 Scale Raster is is cartographically identical to the 1:50 000 Scale "Discoverer" paper map series and supplied in tiles (sized 20km x 20km) and Full-NI coverage. Each tile provides a full colour version (with grids), a low colour version and a townlands map.  Relief shading has been reduced on the low colour raster to make it more suitable for GIS.

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.