- A conic map projection having distances between meridians along every parallel equal to those distances on a globe. The central geographic meridian is a straight line, whereas the others are curved and the parallels are arcs of circles.多圆锥投影：一个圆锥形的地图投影，在地球仪上，沿着每条纬线的子午线间的距离都与它们之间的距离相等。中央地理子午线是一条直线，而其它的子午线则是弯曲的，纬线是圆形的弧线