OSNI Open Data - BenchMarks - Height

OSNI Benchmark data consists of point data giving the location of the points, along with the
associated text which shows the height value. Bench marks are shown in metres above mean sea
level. This data is not maintained. It is recommended to use a Global Navigation Satellite System
(GNSS) and the latest geoid model to find orthometric height in Northern Ireland.
Publisher name: OpenDataNI
Last updated: 2025-11-12T04:00:24Z