基于地理处理服务的DEM水系提取方法的研究及其应用

发布时间：2018-04-15 01:29

本文选题：DEM + 地理处理服务　；参考：《福州大学》2013年硕士论文

【摘要】：基于DEM的水系提取是数字水文研究的热点。目前,基于DEM的水系提取方法集成于许多传统商业软件中,这些商业软件处理流程简单易懂,但是需要购买相应的软件,且在单机环境下完成,对网络资源的利用程度不足。论文围绕地理处理服务的关键技术、基于地理处理服务的水系自动提取等方面展开研究,研究在网络环境下调用水系地理处理服务,完成水系提取的自动化提取,并以九龙江流域的DEM数据作为实验,对基于地理处理服务的DEM水系自动提取方法进行验证。论文的主要研究内容和成果如下：(1)地理处理服务关键技术。对地理处理和地理处理服务的相关概念进行了概述,探讨了地理处理服务执行模式、服务状态性管理、服务粒度和服务接口访问模式等关键技术,得出了在复杂地理处理过程中,地理处理服务的执行模式以异步执行为优,服务状态性管理适合采用池化的无状态的方式进行管理,服务的粒度上适合采用粗粒度的服务,使用REST接口是更适合复杂地理处理的接口访问方式。(2)基于地理处理服务的水系自动提取。研究了DEM水系提取的方法并建立DEM水系提取模型,包括DEM的预处理、水流方向的计算、汇流累积量的计算、河网生成四个步骤；分析了地理处理模型发布成服务的方法,探讨了在网络环境下调用地理处理服务的方法。(3)九龙江流域DEM水系提取分析与评价。以九龙江流域30米分辨率DEM为例,对基于地理处理服务的水系提取方法进行验证。分别采用定性和定量分析的方法,将基于地理处理服务提取的水系结果和参考水系进行定性和定量的分析。结果表明,该基于GP服务的DEM水系提取方法提取的九龙江流域水系,能够客观反映该流域的水系空间分布状况。
[Abstract]:Water system extraction based on DEM is a hot topic in digital hydrology research.At present, the water system extraction method based on DEM is integrated into many traditional commercial software. The processing flow of these commercial software is simple and easy to understand, but it needs to purchase the corresponding software, and it is completed in a single computer environment, and the utilization of network resources is insufficient.This paper focuses on the key technology of geographic processing service, the automatic extraction of water system based on geographic processing service, and studies how to transfer the water system geographic processing service under the network environment to complete the automatic extraction of water system.Based on the DEM data of Jiulong River Basin, the automatic extraction method of DEM system based on geographic processing service is verified.The main research contents and results are as follows: 1) key technologies of geographic processing services.This paper summarizes the related concepts of geographic processing and geographic processing services, and discusses the key technologies of geographic processing service execution mode, service state management, service granularity and service interface access mode, etc.In the process of complex geographic processing, the execution mode of geographic processing service is superior to asynchronous execution, the service state management is suitable for the management of pool stateless mode, and the granularity of service is suitable to adopt coarse-grained service.The use of REST interface is more suitable for complex geographical processing interface access. 2) automatic extraction of water system based on geographic processing services.This paper studies the method of DEM water system extraction and establishes the DEM water system extraction model, which includes four steps: the pretreatment of DEM, the calculation of water flow direction, the calculation of flow accumulation, and the generation of river network.This paper discusses the method of transferring geographic processing service under the network environment. The analysis and evaluation of DEM drainage system extraction in Jiulong River Basin.Taking the 30 meter resolution DEM of Jiulong River Basin as an example, the method of water system extraction based on geographic processing service is verified.Qualitative and quantitative methods were used to analyze the results of water system extraction based on geographic processing services and the reference water system respectively.The results show that the DEM system extraction method based on GP service can objectively reflect the spatial distribution of the water system in Jiulong River Basin.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208

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