I am working on a bookshelf which, due to the way I am building it, requires some of the pieces to be exactly measured to within 1/64th over 4-5 foot lengths. Obviously no yardstick is so accurate.
What techniques can be recommended for making such an accurate measurement?
I have access to machinist's tools, such as a complete set of gage blocks and machinist's squares and rules, however the rules I have are at most 16 inches long.
The material is white oak.