基于DEM条件下对中区地改精度的计算方法  

A TENTATIVE DISCUSSION ON THE PRECISION CALCULATION METHOD OF MEDIAN REGION TERRAIN CORRECTION BASED ON DIGITAL ELEVATION MODEL

作　　者：张国利[1] 赵更新[1] 王德启 苏永军[1] 刘继红[1] 邢怡[1] 滕菲[1] 张素荣[1] 

机构地区：[1]天津地质调查中心,天津300170 [2]河北省地球物理勘查院,河北廊坊065000

出　　处：《物探与化探》2013年第6期1133-1136,1140,共5页Geophysical and Geochemical Exploration

摘　　要：针对中区地改精度计算与评价的问题,笔者采用了旋转DEM数据和测量数据的方法,计算中区地形改正精度,对旋转数据方法的可行性及旋转的精度进行了阐述,并用高精度的1∶1万DEM数据对1∶5万DEM数据进行了精度评价。通过对比分析,认为旋转方法是切实可行的,地改精度能够满足1∶5万重力勘探的要求。Aimed at solving the problem of precision calculation and assessment in median region terrain correction,this paper puts forward a method for computing median region terrain correction precision by rotating digital elevation model( DEM) data and measured data,and discusses the feasibility of the method and the precision of the rotated data. At last,the precision of the 1∶ 50 000 DEM data is evaluated with a high accuracy of 1∶ 10 000 DEM data. The Comparative analysis shows that the rotation method is feasible and practical,and that the precision of the terrain correction can meet the requirement of 1∶ 50 000 gravity exploration.

关 键 词：DEM数据 中区地形改正 精度计算 区域重力 

分 类 号：P631.1[天文地球—地质矿产勘探]