| 流动重力空间插值方法比较 |
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| 引用本文： | 朱钰,王伟,章传银,王庆良.流动重力空间插值方法比较[J].测绘通报,2017,0(10):12-17. |
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| 作者姓名： | 朱钰 王伟 章传银 王庆良 |
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| 作者单位： | 1. 兰州交通大学测绘与地理信息学院, 甘肃 兰州 730070;2. 甘肃省地理国情监测工程实验室, 甘肃 兰州 730070;3. 中国测绘科学研究院, 北京 100039;4. 中国地震局第二监测中心, 陕西 西安 710054 |
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| 摘 要： | 流动重力对于地震监测具有十分重要的指示作用，对其进行空间插值能获取其空间分布特征、弥补测站数据较少的不足。本文使用球面Kriging、反距离加权、改进的Shepard 3种方法对流动重力进行插值，从数据分布、插值点个数、插值分辨率、搜索半径（搜索点数）分析插值结果，并对结果予以验证。结果表明：①与球面Kriging、反距离加权法相比较，改进的Shepard方法对于流动重力的插值能取得较好的结果，当插值区域内流动重力样本点的变化较小、不存在异常点时，使用球面克里金插值会获得连续性好、平滑度较高的插值结果；②流动重力插值过程中要根据样本点分布特征、插值范围选取适当的分辨率；③对于地球要素插值，要充分考虑其地球物理构造性质及空间相关性和变异性。
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| 关 键 词： | 流动重力 球面Kriging 反距离加权 改进的Shepard |
| 收稿时间： | 2017-02-20 |
Comparison on Mobile Gravity among Different Spatial Interpolation Methods |
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| ZHU Yu,WANG Wei,ZHANG Chuanyin,WANG Qingliang.Comparison on Mobile Gravity among Different Spatial Interpolation Methods[J].Bulletin of Surveying and Mapping,2017,0(10):12-17. |
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| Authors: | ZHU Yu WANG Wei ZHANG Chuanyin WANG Qingliang |
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| Institution: | 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China;2. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China;3. Chinese Academy of Surveying and Mapping, Beijing 100039, China;4. The Second Monitoring and Application Center, CEA, Xi'an 710054, China |
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| Abstract: | The mobile gravity is an important indicator for seismic monitoring, which is essential to obtain the spatial distribution characteristics and makes up for the lack of data obtained by spatial interpolation.In this paper,we used three kinds of interpolation methods which included spherical Kriging,inverse square distance and improved Shepard to interpolate mobile gravity,meanwhile,the results were analyzed from data distribution, the number of interpolation points, interpolation resolution and search radius ( search points)and verified.The results showed several meaningful conclusions,which mainly contained three aspects as follows.①Compared with spherical Kriging,inverse square distance and improved Shepard achieved better results for the interpolation of mobile gravity, nevertheless,Kriging produced well-continuity and high-smoothness results when there is less outliers and less difference in sample.②The selecting of an appropriate resolution need to according the distribution of sample points and interpolation range in mobile gravity interpolation process.③It is overwhelmingly significant to comprehensively consider the geophysical tectonic characteristics and spatial correlation and variability in the earth element interpolation. |
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| Keywords: | mobile gravity spherical Kriging inverse square distance improved Shepard |
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