檢視磁偏角的原始碼

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中文名；磁偏角

外文名；Magnetic declination

提出者；罗伯特·诺曼

提出时间；1581年

应用学科；测绘学

最早提出者；沈括
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'''磁偏角'''，是指地球表面任一点的磁子午圈同地理子午圈的[[夹角]]。因指南针、磁罗盘是测定磁偏角最简单的装置，所以磁偏角的发现和测定的历史也很早。1702年，英国埃德蒙多·哈雷发表了第一幅大西洋磁偏角等值线图。根据[[规定]]，磁针指北极N向东偏则磁偏角为正，向西偏则磁偏角为负。磁偏角'是指磁针静止时，所指 的北方与真正北方的夹角。我国北宋学者沈括在《[[梦溪笔谈]]》中，记载了地磁的南北极与地理的南北极并不完全重合，存在磁偏角。<ref>[https://wenku.so.com/d/61d554267c8268c5d0751401229a0101 中国各地磁偏角],360文库 , 2019年6月30日</ref>