一种地磁匹配制导基准图制备方法及其有效性评价
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摘要
针对地磁匹配制导基准图制备的需求,采用Surfer8.0软件提供的12种插值算法对选定区域离散总磁场强度测量值进行了网格化处理,生成所需的地磁基准图;提出了适用于地磁匹配制导的数据网格化有效性评价标准,并依据所提出的评价标准对使用12种方法所生成的地磁基准图进行了评价。结论表明:在选定区域,克里格法和径向基函数法生成网格化数据指标较好,这两种方法可以生成精度较高的网格化数据。
According to the demand of geomagnetic reference maps for geomagnetism matching guidance,some total geomagnetic intensity measurements on several discrete spots in a chosen area are processed with 12 interpolate algorithms provided by Surfer 8.0,and the required reference maps are generated.A validity evaluation criterion of geomagnetic reference map grid data used for geomagnetism matching guidance is introduced and the detail description is presented.According to the criterion,the reference maps generated with the 12 interpolate algorithms are evaluated.Results show that in the chosen area,the performance of the data generated by Kriging method and the radial basis function method are better.Both methods can generate accurate grid data.
According to the demand of geomagnetic reference maps for geomagnetism matching guidance,some total geomagnetic intensity measurements on several discrete spots in a chosen area are processed with 12 interpolate algorithms provided by Surfer 8.0,and the required reference maps are generated.A validity evaluation criterion of geomagnetic reference map grid data used for geomagnetism matching guidance is introduced and the detail description is presented.According to the criterion,the reference maps generated with the 12 interpolate algorithms are evaluated.Results show that in the chosen area,the performance of the data generated by Kriging method and the radial basis function method are better.Both methods can generate accurate grid data.
引文
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[2]安振昌.1950-2000年中国地磁测量地磁图与地磁研究[J].地球物理学进展,1999,14(4):74-86.
[3]陈欢欢,李星,丁文秀.Surfer8.0等值线绘制中的十二种插值方法[J].工程地球物理学报,2007,4(1):52-57.
[4]白世彪,陈晔,王建,等.值线绘图软件Surfer7.0中九种插值法介绍[J].物探化探计算技术,2002,24(2):157-162.
[5]潭继强,丁柱明.空间数据插值方法的评价[J].测绘与空间,2004,27(4):11-13.
[6]金绍华,于波,刘雁春,等.海洋磁力异常逼近方法研究[J].海洋测绘,2006,26(2):6-12.
[7]魏东.重力匹配定位方法研究[D].哈尔滨工程大学,2004.
[8]汤国安,刘学军,闾国军.数字高程模型及地学分析的原理与方法[M].北京:科学出版社,2005.
[9]Li Z.On the measure of digital terrain model accuracy[J].Pho-togrammetric Record,1988,72(12):873-87.
[10]乔玉坤,王仕成,张琪.地磁匹配特征量的选择[J].地震地磁观测与研究,2007,28(1):42-47.
[11]胡鹏,吴艳兰,胡海.数字高程模型精度评定的基本理论[J].地球信息科学,2003,3:64-70.
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