论文部分内容阅读
经纬网是地理学的基础,它的空间性与应用性很强,往往与地球运动、地图相关的知识结合进行命题,突出考查读图分析能力、空间思维能力及知识的迁移能力等。理解经纬网的分布规律及特点是正确解题的关键。经纬网的应用1.根据经纬网确定方向基本规律:(1)经线指示南北方向,纬线指示东西方向。如同一经线上的两点为正南正北关系。(2)南北方向是绝对的,东西方向是相对的。(3)判定东西方向时,注意要选择劣弧(两点之间的弧度小于180°),再按照地球自西向东的自转方向确定方位。即如果两点都在东经,经度数值大的在东;如果两点都在西经,经度数值小的在东;两点分属东西经度,一定遵循“劣弧”定向。
Latitude and longitude network is the basis of geography, its spatial and applicability is very strong, often with the movement of the Earth, the combination of knowledge related to the proposition proposition, highlighting the test map analysis ability, spatial thinking ability and knowledge transfer ability. It is the key to correct problem solving to understand the distribution rules and characteristics of Jingwei network. The application of latitude and longitude network 1. According to the basic rules of the latitude and longitude network to determine the direction: (1) warp north-south direction, latitude direction of the east-west. Just as the two points on the longitude are the relationship between the south and the north. (2) The north-south direction is absolute and the east-west direction is relative. (3) When judging the east-west direction, pay attention to choose the inferior arc (the radian between two points is less than 180 °), and then orient according to the rotation direction of the Earth from west to east. That is, if the two points are in the east longitude and the longitude is large in the east, if the two points are in the west longitude and the longitude degrees are small in the east, the two points belong to the longitude of the east and the west and must follow the direction of the inferior arc.