| 一种基于距离场的三维地质空间属性插值方法 |
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| 引用本文： | 黄岸烁,张宝一.一种基于距离场的三维地质空间属性插值方法[J].地质与勘探,2019,55(6):1510-1517. |
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| 作者姓名： | 黄岸烁 张宝一 |
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| 作者单位： | 中南大学地球科学与信息物理学院,湖南长沙,410083;中南大学地球科学与信息物理学院,湖南长沙 410083;中国地质大学地质过程与矿产资源国家重点实验室,湖北武汉 430074 |
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| 基金项目： | 国家自然科学基金(编号：41772348、41302259)资助。 |
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| 摘 要： | 针对根据一系列属性等值线剖面/断面数据进行三维空间插值问题,笔者提出一种基于距离场的三维空间属性插值方法。首先,根据对应属性等值线轮廓生成三维等值面;然后,构建属性等值面的三维距离场;最后,对于空间内任意点属性,根据其两侧等值面的距离场数据进行线性插值求取,从而生成整个三维空间内的属性场模型。将该方法应用于某铜矿区的可控源音频大地电磁法(CSAMT)剖面数据,在已知视电阻率等值线剖面的基础上,插值得到三维空间的视电阻率场,可用于揭示地下空间物性分布和预测隐伏矿体等。
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| 关 键 词： | 距离场 属性场 插值 三维空间 CSAMT 铜矿区 |
| 收稿时间： | 2018/6/22 0:00:00 |
| 修稿时间： | 2019/1/12 0:00:00 |
A method of three-dimensional geo-spatial attribute interpolation based on the distance field |
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| Huang Anshuo.A method of three-dimensional geo-spatial attribute interpolation based on the distance field[J].Geology and Prospecting,2019,55(6):1510-1517. |
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| Authors: | Huang Anshuo |
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| Institution: | School of Geosciences and Info-Physics, Central South University, Changsha, Hunan;
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, Hubei |
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| Abstract: | To solve the problem of three-dimensional spatial attribute interpolation according to the contours extracted from a series of section data, a three-dimensional spatial attribute interpolation method based on the distance field. Firstly, the contour surfaces are generated according to the corresponding contour lines. Secondly, the three-dimensional distance fields of the corresponding contour surfaces are constructed respectively. Finally, the attribute of each voxel in three-dimensional space is determined by linear interpolation of distance fields of its two-neighboring contour surfaces, thus a three-dimensional spatial attribute field model is generated. This method has been applied to profile data a controlled source audio-frequency magnetotelluric (CSAMT) survey in a copper mine area, and the three-dimensional apparent resistivity field is generated based on known resistivity profiles, which can help reveal of the physical attribute distribution of underground space and predict concealed ore-bodies. |
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| Keywords: | distance field attribute field interpolation three-dimensional space |
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