File:IV Postcode Area Map.svg
Indicative postcode districts shown in red, post towns shown in grey.
Equirectangular projection with latitude stretching 180%, WGS84 datum.
Geographic limits:
- Main 1:904,000 map:
- West: 6.886W
- East: 2.926W
- North: 58.703N
- South: 56.943N
Derived from Ordnance Survey OS OpenData.
- Postcode district boundaries within Great Britain derived from Voronoi polygons of OS Code-Point Open unit postcode median coordinates (with coastline clipping and minor adjustments to avoid spurious detached polygons).
- Great Britain coastline, inland water and urban extent data derived from OS Strategi.