Labelled map of Royal Mail postcode districts of the WF postcode area.
Indicative postcode districts shown in red, post towns shown in grey.
Equirectangular projection with latitude stretching 170%, WGS84 datum.
Geographic limits:

Main 1:152,000 map:
West: 1.763W
East: 1.151W
North: 53.78N
South: 53.564N
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.
Richardguk