* Fit a larger map into a smaller space: By folding the map into sections, it can be easily stored and transported.
* Show different levels of detail: The main part of the map might show a general overview, while the flap reveals more detailed information about a specific area.
* Include additional information: The flap might contain a legend, key, or other helpful information about the map.
To use a map with an extra flap, follow these steps:
1. Unfold the main map: This will show you the general overview or the area you are interested in.
2. Locate the flap: It might be attached to the edge of the main map, or it might be tucked underneath.
3. Carefully unfold the flap: The flap might contain detailed information about a specific area, or it might have additional information like a legend.
Here are some examples of maps that use extra flaps:
* Historical maps: Many historical maps used flaps to show different levels of detail or to include additional information.
* Tourist maps: Some tourist maps use flaps to reveal more detailed maps of specific neighborhoods or attractions.
* Pocket maps: These are often designed with flaps to make them compact and easy to carry.
If you are unsure how to unfold a map with an extra flap, it is always best to consult the map's instructions or seek guidance from a professional map collector or historian.