A Digital Terrain Model (DTM) is a digital file consisting of a grid of regularly spaced points of known height which, when used with other digital data such as maps or orthophotographs, can...
The OSNI Large-scale boundaries is a polygon dataset consisting of the Townland boundaries.Townlands are anancient method of land measurement found only in Ireland and can be very important in...
National Grid Reference System for Northern Ireland composed of 292 sheets and provides the naming convention for the 1:10 000 scale mapping. The 10k Grid is published here for Open Data and can be...
This table provides the raw data from river monitoring sites including Water Framework Directive monitoring sites. It should be noted that, as the data set is in its raw state, it cannot be used to...