| 黄岸烁.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 |
| 一种基于距离场的三维地质空间属性插值方法 |
| A method of three-dimensional geo-spatial attribute interpolation based on the distance field |
| 投稿时间：2018-06-22 修订日期：2019-01-12 |
| DOI：10.12134/j.dzykt.2019.06.017 |
| 中文关键词: 距离场 属性场 插值 三维空间 |
| 英文关键词: distance field, attribute field, interpolation, three-dimensional space |
| 基金项目:国家自然科学基金(编号：41772348、41302259)资助。 |
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| 中文摘要: |
| 针对根据一系列属性等值线剖面/断面数据的三维空间插值问题，笔者提出一种基于距离场的三维空间属性插值方法。首先，对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，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，插值得到了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。 |
| 英文摘要: |
| 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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