基于Canvas的岩性符号管理系统的设计与实现

Design and implementation of lithology symbol management system based on Canvas

岩性符号作为反映地质特性的图形化语言,在地质勘探领域有着重要的地位,对于地质研究人员进行分析交流有重要作用。现有的岩性符号管理系统多采用C/S架构,此架构跨平台性能差,交互性和灵活性也无法满足专业人员的需求。针对上述问题,本文构建了一种基于B/S架构的岩性符号管理系统,利用HTML5中Canvas技术的强大绘图特性,结合曲线抽稀和插值拟合的方法,实现了岩性符号在线绘制及绘制指令抽取的功能,利用抽取的指令可以在其他应用场景重现绘制的岩性符号。设计的系统跨平台性能好,可在各大主流浏览器上运行。

As a graphical language reflecting geological characteristics,lithology symbols play an important role in the field of geological exploration,which are also very important for geological researchers to analyze and communicate with each other.Existing lithology symbol management systems mostly use C/S architecture.Detailed analysis shows that the design has poor cross-platform performance,and the corresponding interactivity and flexibility can not meet the needs of professionals.In response to this problem,this paper constructs a lithology symbol management system based on the B/S architecture,uses the powerful drawing features of HTML5 Canvas technology and combines with curve thinning and interpolation fitting methods,to achieve the drawing of lithology symbols and the function of extracting instructions.Using the extracted instructions,the drawn lithology symbols can be reproduced in other application scenarios.The designed system has good cross-platform performance and can run on major mainstream browsers.