[klem]

I find large woods or groups of woods are one of the best landmarks for identifying where I am if I get lost. It can be difficult over mid SE England where there are many smaller woods but then again, at altitude, a visual check on the direction of coastline features (a bit of mental triangulation) will give a good rough indication of where you are. From there you can zoom in on the map and start checking the wood shapes. Also, towns stand out reasonably well when you are close to them, that can also be fitted into the picture. Rivers are a bit odd. At distance they are almost useless but closer to and especially tracking at nought feet they can be very useful along with towns.

It will be interesting when someone starts running servers with Rhubarb weather, low cloud base, impenetrable rain. Going to need the compass then and low level features like the rivers, towns.... and prayer.