WOM21 Welsh Archaeological Trusts
Shows areas of consultation for each Welsh Archaeological Trusts - this is useful as a reference for working out the correct authorities to contact.
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/