怎样认定方向? 我们拿到一张地图,常常以为是上北下南左西右东,这在有些地图的确是如此,但有的地图并不是这样,甚至有的地图在中心是北,其余的各方向都是南。因此这里必须懂得经纬线的看法,经纬线是我们在地球表面上虚设的线,它的主要目的是便於我们区别在地面上的方位的,经线都是正确的南北方向线,经线都是正确的东西方向线。在地图上,我们是用种种不同的方法画出了经纬线,经線有时是南北的平行线,有时是放射成扇形的直线,有时是弯曲线。经线指着北极的一端便是北,反之便是南。如绘一张北极区域的地图,北方便是中心的一点,其他各方向都是南。又如苏联和中国的地图,经线都是成为扇状的放射直线,地图的北方便是循着经线向北的 How do we determine the direction? We often get a map, which is often thought of as going north, south, west, right and east. This is true in some maps, but some maps are not. Even some maps are in the center, and the rest are All directions are south. Therefore, here we must understand the view of the latitude and longitude lines. The latitude and longitude lines are the lines that we fake on the surface of the Earth. Its main purpose is to make it easier for us to distinguish the orientations on the ground. The warp lines are the correct north-south direction lines and the warp lines are correct. East-west direction line. On the map, we have drawn the latitude and longitude lines in various ways. The meridian line is sometimes a parallel line between the north and the south, sometimes it is a fan-shaped radial line, and sometimes it is a curved line. The end of the warp that points to the North Pole is North, and vice versa is South. For example, if you draw a map of the Arctic region, North Convenience is a point in the center. All other directions are in the south. Like the maps of the Soviet Union and China, the warp lines are all fan-shaped radiation lines. The northern convenience of the map is northward along the meridian line.