基于Surfer软件的数据网格化方法探析  

The Discussion on the Geophysical Data Gridding Based on the Surfer Software

作　　者：王美丁 马见青[2] 樊金生 

机构地区：[1]西安西北有色物化探总队有限公司,陕西西安710068 [2]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《工程地球物理学报》2017年第6期694-700,共7页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金项目(编号:41374145);基础性公益性地质矿产调查项目(编号:214026160150);长安大学中央高校基本科研业务费专项资金(编号:310826161008)

摘　　要：Surfer软件的数据网格化功能在地球物理数据处理中有基础性的作用。在利用Surfer软件进行地球物理数据网格化时,一些参数的特殊设置可直接影响到网格化的效果,影响等值线平面图的异常形态。以实测1∶5万高精度地面磁测资料为例,通过对数据网格化间距和克里格网格方法里的搜索椭圆参数进行特殊设置,分析上述参数设置对网格化数据的影响。结果表明,数据网格化时X、Y方向的网格间距都设置为点距大小,既能与后期MapGIS成图对接,同时能保证数据异常的真实性。将搜索椭圆的搜索半径1、半径2分别设置为3倍的线距和点距,搜索角度设置为垂直于测线方位角的方向,这样既不改变线距和点距之间的实际比例关系,同时提高了相邻测线测点对给定网格节点的场值大小影响,减弱了同测线相邻测点的影响,一定程度上弱化了顺线异常,提高了图面美观性。The data gridding function of Surfer software plays a fundamental role in geo-physical data processing. Some parameters setting in Surfer can directly influence the grid effect that can affect the contour shape. Taking the magnetic survey data of 1 ： 50 000 high -precision as an example, this paper analyzes the effect of the parameters settings on grid data based on special settings on gridding spacing and the searching ellipse parameters in Craig mesh method. The results show that gridding spacing is set to points size, which can-not only match the Mapgis, but also can ensure the authenticity of data anomalies. The search radius of 1 an 2 in search ellipse are set to 3 times the line spacing and 3 times the point spacing and the search angle is set to the vertical line direction, which don^t change the actual proportion relation between line and point distance？ improve the effect of adja-cent line survey points on the field values of fixed grid nodes and weaken the effect of adja-cent measuring points at the same survey line. Therefore, the line anomaly is weakened and the beauty of the image surface is improved at a certain extent.

关 键 词：SURFER软件 克里格网格方法 网格化参数 等值线图形态 顺线异常 

分 类 号：P631.2[天文地球—地质矿产勘探]