基于地学工作流脚本方法的多源地理信息处理集成及实现

发布时间：2018-04-14 14:18

本文选题：地学工作流 + 脚本方法　；参考：《武汉大学》2017年硕士论文

【摘要】：科学工作流在复杂科学计算方面起着十分重要的作用,其通过过程集成的方式实现数据集成、计算集成以及分析集成,是进行复杂科学计算和流程管理的有效手段。在地理科学领域,地学工作流可广泛应用于空间数据的处理与分析方面,实现地理信息处理的流程自动化,提高地理处理建模和模型复用能力,提升地理信息的分析挖掘以及地理现象的模拟预测能力。基于组件的多源异构地学资源的集成是当今研究热点,也是未来的发展趋势。本地地学组件能够为地理信息处理提供丰富、复杂的功能算子与模型框架,地学空间信息基础设施迫切需要能够集成多源地理信息处理功能的工作流软件,实现对多源异构地学资源的过程集成。但本地组件在框架、系统、语法等方面存在很强的异构性,对异构地学组件的集成是需要解决的问题。基于上述思路,本文进行了方法设计和系统实现,其主要贡献如下:(1)提出了一种多源处理功能集成的工作流脚本方法,其利用脚本的"粘合"特性将不同框架下的地学组件作为独立的模块松散耦合在一起,并利用规范的组件描述技术封装不同框架下的地学组件,得到与工作流软件松散耦合的功能单元,完成地学组件与工作流软件之间的关联,最终实现基于工作流建模工具的多源处理功能集成。(2)对地学工作流软件GeoJModelBuilder进行了扩展,设计了一种基于脚本的工作流引擎,实现从抽象节点构成的功能算子链到嵌入式脚本文件的自动映射以及脚本的自动化执行,从而控制各功能单元间的数据依赖关系及执行顺序,实现不同框架下地学组件的过程集成和流程自动化。使GeoJModelBuilder在空间信息服务组合的基础上进一步集成本地地学组件,实现了多源处理功能集成的原型系统。
[Abstract]:Scientific workflow calculation plays an important role in the complex science, through the way of integrated process to realize data integration, integrated analysis and calculation integration, is an effective means for the complex scientific calculation and process management. In the field of geography, geo workflow can be widely used in processing and analyzing spatial data, implementation process the automation of geographic information processing, improve geographic modeling and model reuse ability, enhance the ability of simulation and prediction of geographic information analysis and mining geographic phenomena. Based on the integration of multi-source heterogeneous component geo resources is the research focus, but also the development trend in the future. The local schools for geographic information processing components can provide rich function operator with the framework of the complex, need to learn spatial information infrastructure urgently to integrate multi-source geographic information processing work Flow software, realize the integration process of multi-source heterogeneous geological resources. But the local component in the framework of system, there is a strong heterogeneity of grammar, the integration of heterogeneous geoscience component is needed to solve the problem. Based on the above ideas, this paper design method and system realization, the main contributions are as follows: (1) proposed a multi-source processing function integrated workflow script method, using the script "glue" characteristics will be different under the framework of learning components as independent modules loosely coupled together, and the use of standard component description technology package under the framework of the study of different components, functional unit and loose workflow software coupling, complete geo association between components and workflow software, realize the integration of multi-source processing function based on workflow modeling tool. (2) to study workflow software by expanding GeoJModelBuilder, The design of a workflow engine based on script, realized from the abstract node function operator chain to embedded script file automatic mapping and script execution automation, so as to control the functional units of the data dependency between and the execution order of different components of the framework, process integration and process automation. The further integration of GeoJModelBuilder the local geo spatial information service based on component combination, to achieve multi function integration prototype system.

【学位授予单位】：武汉大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P208

【参考文献】