State Secondary Schools Wales
School locations datasets compiled from OS Addressbase, mylocalschool, Address list of schools and the Pupil Level Annual School Census (PLASC).
MapDataCymru
Mae MapDataCymru'n ffynhonnell ar gyfer data'r sector cyhoeddus yng Nghymru, gan ddarparu platfform data ar y cyd i aelodau'r cyhoedd ac awdurdodau cyhoeddus.
https://mapdata.llyw.cymru/