ContourMap OSNI is derived from the Ordnance Survey of Northern Ireland (OSNI) 1:50,000 Terrain data set. It consists of a set of contour lines covering Northern Ireland. There is also a set of spot heights in the form of points.
ContourMap OSNI suggested applications
- Insurance risk;
- Line-of-site analysis;
- Floodplain mapping.
ContourMap OSNI features & use
- ContourMap regions at 10m intervals supplied in 20km x 20km tiles;
- Manipulate a 3D view of the land surface interactively, using the mouse;
- Shade the contour polygons 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).
ContourMap 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 70MB for full NI coverage in MapInfo TAB format.
Main formats available: MapInfo TAB, ESRI SHP, AutoCAD DXF, Illustrator EPS and others.
ContourMap 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.
ContourMap OSNI coverage available
- Northern Ireland; or
- Selected area (priced per sq km); and
- Great Britain (companion product – ContourMap - derived from the Ordnance Survey Land-Form PANORAMA dataset).