The X and Y coordinate system is a method of describing land used in Colorado. This method of describing land:

Answer: The answer is - divides the state into three zones

Explanation:

The x and y coordinate system is a method of describing land used in Colorado. It divides the state into three (3) different zones each containing one-third (1/3) of the counties which include;

The Northern Zone The Central Zone The Southern Zone

Colorado is divided into roughly equal horizontal zones North, Central and South. Counties located in the northern one-third are designated "Colorado Coordinate System, North Zone", and the same applies to Central and South zones.