My birds eye view is so blurry you cannot work out what it is. Google maps is so much better and would work well. Ring please fix this issue and following a little research i see its a known problem.
@Richmike Ring use a company called MapBox to provide the mapping for the feature. You are correct in your observation that the coverage in large parts of the UK is very very poor. Much better in the USA from what I understand. The feature is only of use if you have a fairly large property or large front garden/approach to your home from what I have found. I just switched the function off as it was of no benefit to my setup.