Hi Poncratis,

Are you able to clarify if there are any other sources you are using? Bing aerial imagery in this area isn't high enough resolution for the detail you are mapping at, and some other features such as small bare rock, meadow, wood and scrub areas seem too small to be viable. I'm concerned you may be mapping for the renderer rather than mapping what is actually visable on aerial imagery. 

Thanks, Phoebe