DEM数据拼接对重力地形改正的影响及效果  

Influence and effect of dem data mosaic on gravity terrain correction

作　　者：李忠平[1,2] 李学军 戴广凯[4] 张茂辉 LI ZhongPing;LI XueJun;DAI GuangKai;ZHANG MaoHui(School of Geophysics and Spatial Information,China University of Geosciences,Wuhan 430074,China;Zhengyuan Geology and Exploration Institute of Shandong,Bureau of China Metallurgy and Geology,Jinan 250014,China;Zhengyuan Geographic Information Group Co.,Ltd.,Beijing 101300,China;Shandong Institute of Geological Survey,Jinan 250013,China;Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国地质大学地球物理与空间信息学院,武汉430074 [2]中国冶金地质总局山东正元地质勘查院,济南250014 [3]正元地理信息集团股份有限公司,北京101300 [4]山东省地质调查院,济南250013 [5]中国海洋大学,青岛266100

出　　处：《地球物理学进展》2021年第1期195-201,共7页Progress in Geophysics

基　　金：中国地质调查局地质矿产调查专项(FZK2016-4-166)资助。

摘　　要：数字高程模型(Digital Elevation Model,DEM)在中大比例尺重力地改中广泛应用,但对于数据处理中的多种插值算法的有效融合,并提高精度和处理速度,一直没有得到有效解决.基于ArcGIS10、GeoIPAS3.0、Geosoft的DEM拼接所用插值方法各异,插值精度各有差别,Suffer8在数据拼接时有最近邻居插值法、双线性插值法、立方卷积插值法三种插值方法,有Average、Begin、Last、Minimum、Maximum六种交迭方法.本文提出一种基于改进的双线性插值法DEM数据拼接方法,与Suffer8双线性插值法运算方法相比,处理精度更高,并有效规避了离差点缺陷.将其用于山东省栖霞市臧家庄幅1:5万重力中区地改,证明该方法处理效率更高,快速精确.Digital Elevation Model(DEM) is widely used in gravity modification of medium and large scales, but it has not been effectively solved for the effective fusion of multiple interpolation algorithms in data processing and the improvement of accuracy and processing speed. Based on ArcGIS10, GeoIPAS3.0, and Geosoft’s DEM stitching, the interpolation methods are different and the interpolation accuracy is different. Suffer8 has three interpolation methods: nearest neighbor interpolation, bilinear interpolation, and cubic convolution interpolation. There are six overlapping methods: Average, Begin, Last, Minimum, and Maximum. This paper proposes a DEM data splicing method based on an improved bilinear interpolation method. Compared with the Suffer8 bilinear interpolation method, the processing accuracy is higher, and the deviation point defects are effectively avoided. The method is applied to the 1:50 thousand gravity center area reform in Zangjiazhuang, Qixia County, Shandong Province, which proves that the method is more efficient, fast and accurate.

关 键 词：数字高程模型 改进的双线性插值法 数据拼接 重力地改 

分 类 号：P631[天文地球—地质矿产勘探]