在以极地为中心的投影图上,如何快速、准确地判断出某地的经纬度位置、确定两地之间的相对方向、并在两地间进行时间的计算,一直是中学地理基础知识教学的重难点之一,也是高考的重要考点之一。为了帮助同学们把握上述知识的学习规律和方法,试就以上几个问题作简要的分析和说明。一、基本方法1.极地投影图上经纬度的判断在以极地为中心的投影图上,经线表现为射线,其经度的判读规律是:以0°经线为界,顺着地球自转方向,向东增大的为东经度;逆着地球自转方向,向西增大的为西经度。具体来说,在以北极为中心的投 How to quickly and accurately determine the latitude and longitude position of a place, determine the relative direction between the two places and calculate the time between the two places has always been the teaching of geography basic knowledge in secondary schools Heavy one of the difficulties, but also one of the important entrance examination. In order to help students grasp the learning rules and methods of the above knowledge, try briefly analyzing and explaining the above questions. First, the basic methods 1. Judgment of latitude and longitude on polar projection map In the polar projection map, the longitude line as a ray, the longitude of the interpretation of the law is: 0 ° longitude line as the boundary, along the direction of Earth’s rotation, eastward Increase for the east longitude; against the direction of Earth’s rotation, increasing westward for the longitude. Specifically, the Arctic-centered cast