The 180th Meridian (2016)
I don&#x27;t really see the point of this post.<p>Any two points on the earth are connected by a great circle. The two points divide the great circle into two arcs. The length of the shorter arc is the distance between them. The midpoint of the two points is half the distance between them along the shorter arc starting from one point.<p>Are any of the values above particularly expensive to compute? I can&#x27;t imagine why I&#x27;d want to compute the midpoint between two points by averaging their latitudes and longitudes. Not only does it break if it travels over the prime meridian, but it&#x27;s also just wrong. The post even says that: &quot;But is the midpoint in longitude, latitude correct? In many cases, it isn’t.&quot;