TerrainMap OSNI is derived from the Ordnance Survey of Northern Ireland (OSNI) Standard DTM covering Northern Ireland. It is made up of a grid of points at 50m intervals.
TerrainMap OSNI suggested applications
- View-shed analysis;
- Wind farm planning;
- Floodplain mapping.
TerrainMap OSNI features & use
- Spot heights at 50m intervals supplied in 20km x 20km tiles;
- Enhanced version available at 10m grid intervals;
- Interpolate a thematic grid map, colouring to create a map tinted according to elevation;
- Analyse points to check their height above sea level;
- Fit closely with contextual RangerMap OSNI product derived from OSNI 1:50,000 Scale Raster dataset;
- Drape other map layers, such as RangerMap OSNI, onto a 3D view of the land surface;
- Available as full national NI coverage or smaller ‘cut-out’ extracts (priced per sq km) or any combination of 20km x 20km tiles (priced per tile).
TerrainMap OSNI technical information
A workspace (for use in MapInfo Professional GIS) or project file (for use in ESRI ArcView/GIS) opens all the layers and sets zoom layer thresholds that determine when the layers are visible.
Suitable for scales on screen in the range 1:200,000 to 1:20,000. The 20km x 20km tiles are based on the OSNI grid.
The Irish Transverse Mercator Grid co-ordinate system is used.
The storage space required is about 360MB for full NI coverage in MapInfo TAB format.
Main formats available: MapInfo TAB, ESRI SHP, AutoCAD DXF, Illustrator EPS and others.
TerrainMap OSNI is licensed for internal business use by a specified number of users and includes hard copy prints up to A3 in size. Publishing on the Internet may require the next multi-user pricing band.
After the first year there is an annual charge equal to the initial price, including one update per year.
TerrainMap OSNI coverage available
- Northern Ireland; or
- Selected area or tile combination (priced per sq km or tile); and
- Great Britain (companion product – TerrainMap - derived from the Ordnance Survey Land-Form PANORAMA dataset).