Understanding the threshold for Ordnance Survey (OS) and digital maps to change names appearing on official maps, and how the data is gathered to achieve this
Deall y trothwy i fapiau’r Arolwg Ordnans (OS) a mapiau digidol newid enwau sy'n ymddangos ar fapiau swyddogol, a sut mae'r data'n cael ei gasglu i gyflawni hyn