Open Location Code (OLC) is a geocoding system for identifying an area anywhere on planet Earth. Originally developed in 2014, OLCs are also called "plus codes". Nearby locations have similar codes, and they can be encoded and decoded offline. As blocks are refined to a smaller and smaller area, the number of trailing zeros in a plus code will shrink

A code area is a region on a map indicated by a lower-left corner---the southernmost latitude and the westernmost longitude. The size of the region is given by the resolution, which is the height and length of the region in degrees