摘要:
世界数字化磁异常图是建立全球地球物理场的基本图件之一,编制该图件旨在服务教学、工业与科学研究,其全球覆盖性使得世界范围的地球科学对比研究与系统研究成为可能.深入认识该图件的数据来源、处理过程、分辨率与可靠性分布,有利于正确与合理地使用该图件与数据.因此,笔者首先介绍了世界磁异常图的研究背景、科学意义与发布形式,其次阐述了编图的基本原则,归纳与分析了编图的相关技术,然后描述了目前的编图进展,最后总结了编图的瓶颈、难点与不合理之处,并且相应地提出了编图的改进措施,期望为我国将来的世界磁异常数据汇编提供参考资料.
Abstract:
As a basic map of the Earth's global geophysical fields,the World Digital Magnetic Anomaly Map (WDMAM) aims at serving education,industry and science.Especially,the global coverage of the map makes possible world-wide comparative researches and global systematic studies of geosciences.Realizing original data sources,processes and distributions of resolution and reliability of the WDMAM is certainly very important and helpful to correctly and properly using this data set in actual applications.Therefore,in this paper,the authors introduce the background,scientific significances and form of the map,present the basic principles of mapping,analyze the corresponding techniques,and deal with the mapping progress.On such a basis,the authors summarize the current bottlenecks and difficulties as well as some points which should be further improved.In addition,the authors correspondingly propose the possible development approaches of the future mapping and provide some basic references for compiling the worldwide magnetic anomaly data by China's experts.
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