Meridian Coordinates

Understanding meridian coordinates is also about knowing where not to needle.

In the grand human endeavor to map our world and the cosmos, we rely on invisible grids. While most people are familiar with the horizontal lines of latitude (parallels), the vertical lines that run from North to South—the meridians—are equally vital. Together, they form the system of meridian coordinates, a framework that underpins everything from the GPS on your phone to the pointing of a massive radio telescope. meridian coordinates

But what exactly is a meridian coordinate, and why is it more than just a line on a map? Example: LU-5 (Lung 5 – Sea point) is

This is the most critical subset of meridian coordinates. Along the limb, from fingertips to elbows (or toes to knees), the Qi changes depth. The coordinates follow a predictable pattern called the "River Metaphor": meridian coordinates

Example: LU-5 (Lung 5 – Sea point) is located at the cubital crease of the elbow. Because it is a "Sea" point, it is traditionally used to "drain rebellious Qi" (coughing/vomiting).