A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ab Ac Ad Ae Af Ag Ai Aj Al Am An Ap Ar As At Au Av Ax Az

alphanumeric grid

[cartography] A grid of numbered rows and lettered columns (or vice versa) superimposed on a map, used to find and identify features. Alphanumeric grids are commonly used as a reference system on local street maps.