Users may come across a treasure map when browsing books by chance.
Higher skill ranks in the book you are browsing will get you maps that may lead to even more valuable treasure.
Making discoveries with a map
Go to the region marked on the map once it is acquired.
It will lead you to the approximate location. Use 'search' skill where the treasure is buried to succeed in discovering.
You will need many different skills to make a discovery based on a map.