The Madison County Public Library, has organized a collection of GPS enabled maps. Using a free smartphone App, you will be able to see your exact position on the map. It's like having a YOU ARE HERE sign follow you around. The maps may be found on our Community Information page or by clicking here.
micrometer (Î¼m) [ 1 mÄ«kromâ²ÉtÉr] 2  1 an instrument used for measuring small angles or distances on objects being observed through a microscope or telescope. 3  2 [mÄ«â²krÅmÄâ²tÉr] , a unit of measurement, commonly referred to as a micron, that equals one millionth (10-6) of a meter.
Used mostly for scientific purposes, a nanometer is a unit of length which equals to 1 / 1,000,000,000 th of a meter. It is a Si unit with the symbol of nm. It is also known as millimicron.