I took one step further with the map, as it it rather big (90cm by 102cm, see my earlier post in this thread) and difficult to handle/fold during flight: I applied the
Falk Patented Folding. There's no article on this ingenious idea in the English wikipedia (just in the
German one), so a short explanation here (and pictures):
This special way of folding a big map and cutting slits at certain places allows to leaf through the folded map both horizontally and vertically - while never exceeding a total unfolded size of much, much less than the whole map. In my case I choose a leaf-through size of 25 by 25.5 cm and folded and cut accordingly.
The pictures in this (and - due to the limitation of max 5 images per post - the next post) show the folded map, the vertical and horizontal leafing, and finally the first step of unfolding the whole map.