All meridians converge at a single point, making the distance between them 0. The Historic Battle for Longitude
Kaelen looked at the clock. It had jumped forward an entire day. He looked back at the wake of the ship. Behind them, it was yesterday; ahead of them, it was tomorrow. They were standing in the "now" that didn't exist on any clock. meridian coordinates
Modern imaging techniques such as and ultrasound have been used to validate the location of these points. A CT study of 58 patients undergoing 107 needle insertions at BL25 and BL26 found that needle tips were consistently located within the intermuscular region between the erector spinae and transversospinal muscles, and that the distance from the midline correlated with the patient's body mass index . This supports the traditional use of proportional measurements (cun) rather than fixed metric distances. All meridians converge at a single point, making
Understanding Meridian Coordinates: The Earth's Longitudinal Grid He looked back at the wake of the ship