MemberMap OSNI (Ordnance Survey of Northern Ireland 1:50,000 Scale Vector)
MemberMap OSNI is based on part of the Ordnance Survey of Northern Ireland (OSNI) 1:50,000 Scale Vector data set, made up of vector layers. It consists of parliamentary constituency boundaries, in the form of polygon regions.
MemberMap OSNI suggested applications
- Canvassing campaigns;
- Asset management;
- Environmental impact analysis.
MemberMap OSNI features & use
- Identify which constituencies contain particular places, and vice versa;
- Look up the names of MPs representing those constituencies;
- Check the dates of all by-elections since the last General Election;
- Compare current parties and majorities against 1997 General Election;
- Shade a thematic map of parties, or election majorities of MPs;
- Plan and monitor the effectiveness of canvassing and lobbying campaigns;
- Match the local authority boundaries in AdminMap OSNI;
- Fits with TrackerMap OSNI and RangerMap OSNI products derived from OSNI raster datasets;
- Available as full national coverage or smaller ‘cut-out’ extracts (priced per sq km).
MemberMap OSNI technical information
A workspace file (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.
The location of boundaries is accurate to within 3m. This is within one pixel on screen at scales of up to 1:10,000.
The Irish Transverse Mercator Grid co-ordinate system is used. The coastline fits closely with RangerMap OSNI (derived from 1:50,000 Scale Raster from OSNI).
Data included for Parliamentary constituencies: Constituency, electorate, name of MP, party, majority, party (1997) and majority (1997).
The storage space required is about 5Mb for full NI coverage in MapInfo TAB format.
Main formats available: MapInfo TAB, ESRI SHP, AutoCAD DXF and others.
MagnaMap OSNI coverage available
- Northern Ireland; or
- Selected area (priced per sq km); also
- Great Britain (companion product – MemberMap - derived from part of the Ordnance Survey Great Britain Boundary-Line dataset)