 This discrepancy left the four states asking if the correct borders were the exact lines of meridian and parallel (and if new, more accurate, surveys needed to be done), or if the markers placed during the initial surveys were now the actual border.The issue was resolved when New Mexico sued Colorado in 1919, and in 1925 the Supreme Court ruled that the markers placed during the initial surveys were the actual borders, even if the markers were off in some locations (this includes the Four Corners Monument).Today's legal description of these border lines is based on the original markers, and not the written description of the borders created when the territories were formed.