耕地信息的地理计算研究

发布时间：2018-04-09 23:00

本文选题：地理计算　切入点：多边形裁剪　出处：《湖南农业大学》2015年硕士论文

【摘要】：过去的地理信息系统(GIS)主要应用于空间数据库建立和地图制图,而作为GIS核心的空间分析应用不多,其中一个重要原因是缺少地理计算及地理计算建模理论指导和技术引领。地理计算和地理计算模型可以流程化,自动化,因此适合地理大数据的处理,进行数据挖掘和知识发现,以发挥地理大数据的空间决策支持作用。本文概述了地理计算的理论与应用,并对多边形裁剪算法进行了详细分析研究与改进,试图实现基于地理计算研究获取耕地信息的方法,从而能够依据已有的耕地地力评价数据库快速获取“感兴趣区域”的耕地信息。主要研究结果如下：1、研究了地理计算的基本框架。从地理计算的概念、应用发展、计算原理、计算方法等不同的方面阐述了地理计算研究。2、以获取“感兴趣区域”内耕地信息为例,对GIS算法中多边形裁剪算法进行了研究,在Weiler-Atherton算法的基础上,根据国内学者的研究成果,提出广义出入点概念,对算法进行改进,实现Weiler-Atherton算法中特殊情况下的失效问题。3、在Visual Studio集成环境中,基于ArcGIS Engine实现了程序的地理计算,可在“地图视窗”中勾画任意多边形获取“感兴趣区域”内耕地信息。4、建立了耕地地理计算建模,可以加入其它地理计算模型,因此可以实现耕地地理计算的自动化、流程化和智能化。
[Abstract]:In the past, GIS (Geographic Information system) was mainly used in the establishment of spatial database and cartography, but spatial analysis, as the core of GIS, was not widely used. One of the important reasons was the lack of the guidance of geography calculation and the theory of geographical computing modeling and the guidance of technology.Geographical computing and geographical computing models can be processed and automated, so they are suitable for the processing of geographical big data, data mining and knowledge discovery, so as to play the role of spatial decision support of geographical #internal_person1#.In this paper, the theory and application of geographic calculation are summarized, and the polygonal clipping algorithm is analyzed and improved in detail, which attempts to realize the method of obtaining cultivated land information based on geographical calculation.Therefore, the cultivated land information of "region of interest" can be obtained quickly according to the existing farmland land evaluation database.The main results are as follows: 1. The basic framework of geographical calculation is studied.From the concept, application development, calculation principle, calculation method and other aspects of geographical calculation, this paper expounds the research of geographical calculation. Taking the information of cultivated land in "region of interest" as an example, the polygon clipping algorithm in GIS algorithm is studied.On the basis of Weiler-Atherton algorithm, according to the research results of domestic scholars, the concept of generalized outlier point is put forward, and the algorithm is improved to realize the failure problem. 3 in the special case of Weiler-Atherton algorithm. In the Visual Studio integration environment,Based on ArcGIS Engine, the program is implemented, which can draw any polygon in "map window" to obtain cultivated land information in "region of interest", establish the model of cultivated land geography calculation, and add other geographical calculation models.Therefore, it can realize the automation, flow and intelligence of cultivated land geographical calculation.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S159.2;S127

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