OSNI® Colour Orthophotography raster images offer a detailed bird’s-eye view of the landscape for the whole of Northern Ireland at 10-centimetre resolution.  Features such as cars, trees and large shrubs as  well as street furniture (benches, signs, lamp posts) and road markings are visible.

OSNI® Colour Orthophotography is ideal for background mapping, identifying development/change in the land, environmental analysis/assessment, right-of-way mapping, land use mapping and various engineering applications.

OSNI® Colour Orthophotography is georeferenced to EPSG: 29900 (TM65 Irish National Grid) and is updated on a three-year flying cycle. It has has a Root Mean Square Error (RMSE) of 0.262m in plan, based on a sample of 3,664 test points. From 2022 onwards, each pixel represents a real-world ground distance of 10cm (Note:  images from 2012-2021 at 16-cm).  Some water-based tiles along the coast and the southern shore of Lough Neagh may not be updated.

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.