Hello,
I was just mapping some details based on GPS traces south of Talybont when I noticed node/3989292520 . It's part of a "natural=heath" polygon that covers a large area north of Ebbw Vale. Unfortunately, as you can see from that node and the ones either side, the accuracy with which it's drawn is very low indeed. That nodes in the middle of a forest area, and the ones to the southwest have been plonked on the map with no thought for the underlying imagery.
OpenStreetMap is a shared map and we all need to work together to create the best map. Imagine if it was a landscape painting - someone's drawing the sky, someone houses, someone trees etc. Then someone comes along with a paint roller to fill in the grass, obscuring what everyone else has done.
Please do spend more time and don't just add very rough large-scale features that other people need to essentially redraw from scratch. It will help if you zoom in a lot more as you are adding stuff. I've said this before in
changeset/35849713 and other people have also commented, such as recently in changeset/43616663 .
Finally, as it is important that we work together, it's only polite to reply in changeset discussions such as the ones I've mentioned (and many others where you have been contacted in the past).
Best Regards,
Andy Townsend, on behalf of OpenStreetMap's Data Working Group.