There are a few more things to do with a topo map then orienteering yourself in the outdoors.
On vacation or in case of an emergency you can:
- Use the map on top of a not so warm sleeping bag as a heat shield / windchill protector.
- Same use if you have only your clothes to sleep in or to cover other less equipped people.
-Use it as a windscreen if you are building a fire in windy conditions or for an alcohol- / gas stove.
-Use it as a splint or part to construct a splint.
- Use it to chase and kill bugs.
- Use it for fanning air in your face or in a fire.
- Use it as wrap / cushion for fragile items you found on your way.
- Use it as warming layer and windchill protector under clothing.

If it has a white backside you can also:
-Reflect light and heat from your campfire into a shelter.
-Reflect light in shady spots while taking photos.
-Use the backside as a high contrast background (good if you have do delicate work in lowlight conditions with older eyes or having lost your seeing aid).
-As white and rectangular stands out in most natural environments, you can use it as a signal and message pad for SAR personal. (Only if it is a map of another place and you don?t need it for other purposes).
-Write your log/journal/last will on the backside.
-Cut off the unimprinted rims and/or parts of the map you do not need in the field for various uses you need paper for.