| 一种利用扩展磁偏角数据自动计算磁偏角的方法 |
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| 引用本文： | 杜献锋,万攀,刘孝明.一种利用扩展磁偏角数据自动计算磁偏角的方法[J].测绘工程,2011,20(6):64-67. |
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| 作者姓名： | 杜献锋 万攀 刘孝明 |
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| 作者单位： | 1. 武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079;75719部队,湖北武汉430079
2. 武汉大学测绘遥感信息工程国家重点实验室,湖北武汉,430079 |
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| 摘 要： | 提出一种基于扫描磁偏角地磁图自动计算磁偏角的方法,把一维磁偏角数据扩展到二维数据,将有关图像校正的方法用在磁偏角的求取上,即在扫描磁偏角地磁图中以图上的地理坐标、扩展磁偏角等值线坐标以及扩展磁偏角等变线坐标所对应的像素坐标为媒介,通过非线性变换,最终建立起地理坐标、磁偏角等值线以及磁偏角等变线之间的相互对应关系,以解决...
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| 关 键 词： | 磁偏角 像素坐标 地理坐标 扩展磁偏角等值线坐标 扩展磁偏角等变线坐标 非线性变换 |
A method of automatically computing magnetic declination via extensional magnetic declination data |
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| DU Xian-feng,WAN Pan,LIU Xiao-ming.A method of automatically computing magnetic declination via extensional magnetic declination data[J].Engineering of Surveying and Mapping,2011,20(6):64-67. |
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| Authors: | DU Xian-feng WAN Pan LIU Xiao-ming |
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| Institution: | 1(1.State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing(LIESMARS),Wuhan University,Wuhan 430079,China;2.75719 Troops,Wuhan 430079,China) |
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| Abstract: | The article presents one method of automatically computing magnetic declination based on geomagnetic declination map.This method extends one dimension geomagnetic declination data to two dimension data,and uses method about image correction on the strike of magnetic declination.It makes corresponding pixel coordinate of geography coordinate,extended magnetic declination equal value coordinate and extended magnetic declination equal change rate coordinate on the map as intermedia,then establishes the mutual corresponding relationship between geography coordinate,extended magnetic declination equal value coordinate and extended magnetic declination equal change rate coordinate through nonlinear transformation for solving automatically computation problem of magnetic declination. |
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| Keywords: | magnetic declination pixel coordinate geography coordinate extended magnetic declination equal value coordinate extended magnetic declination equal change rate coordinate nonlinear transformation |
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