Map makers will mark the Hundredth Meridian as running through the Dakotas, Nebraska, Kansas, Oklahoma and Texas. When explorer John Wesley Powell came along, he observed this was roughly the line between arid land to the west and fertile farm land to the east. Today, this organic line of annual rainfall has shifted to the east and now lies at about the 98th longitude line - another indicator of climate change. This drawing has a shifting divide in the middle to represent arid and fertile landscapes.