Dynamic segmentation is a new technique in the analysis , displaying and mapping of lines in gis 摘要動態分段是一種新的線性特征的動態分析、顯示和繪圖技術。
This paper discusses the expression of dynamic segmentation and the characteristics of its data construction 本文論述了動態分段技術產生的根源,動態分段數據結構的特點。
This paper also introduces the application of dynamic segmentation technique on geographic information system for transportation , river water quality dispersion model , dem development and some other aspects 介紹了動態分段技術在交通地理信息系統、河流水質擴散模型、 dem生成及其它方面的應用。
Dynamic segmentation technology is used to resolve the mutual operation problem between fixed spatial element and abundant attribute data , thus favorable foundation is formed to develop hngis with full functions . ( 2 ) this paper systematically analyzes the characteristics of traffic transit in highway network , explains the relative problems about inquire for the optimal route in highway network . it analyzes the factors affecting users making choice , determines the choice object of transit route : integrated evaluation system of link impedance is formed 系統分析了公路網空間實體集以及它們之間的關系,提出了公路網gis數據的具體組織方法,其中涉及到信息圖層空間劃分、公路網gis數據編碼、數據庫的設計等內容:提出采用動態分段( dynamicsegmentation )技術來解決固定空間要素與海量屬性數據的關聯和互操作問題,為研究開發完全功能的公路網gis打下了良好的基礎。
Whereafter , based on the analysis on the flood influence for traffic lines , the research is centered on the following parts : firstly , the destroying modes , reasons and mechanism of flooded lines are discussed , and the frameworks and countermeasures of preventing and controlling hazards system are put forward ; secondly , the ways of region forecasting for the landslide are analyzed and the automation of landslide forecast for certain site through visual programming is realized . furthermore , the function of dynamic segmentation in arc view is made use of to realize the forecast result ' s visualization ; thirdly , the reasons and patterns of roadbed subsidence are discussed and the methods of forecasting subsidence based on the gm ( 1 , 1 ) model are put forward . then the applications of the arcview software and its extended module on the study of roadbed subsidence are debates upon ; fourthly , an analysis on the sources of flood for traffic lines , which situate in the reservoir coverage area , is given 接著,論文探討了山區交通線路災害的特點、分類、時間和空間分布規律以及災害的防治原則和對策等;然后,以洪水災害對交通線路的毀壞為主線,重點研究和分析了以下幾個問題:第一,探討了洪水對交通線路的破壞方式,水毀原因以及水毀機理,并提出了交通線路水毀防御系統框架和對策;第二,分析了雨季邊坡塌方災害的區段預測方法;通過可視化編程,編制了雨季邊坡塌方災害的工點預報程序,并結合arcview實現了預測結果的可視化;第三,對路基沉陷原因和模式進行了分析,并提出利用gm ( 1 , 1 )模型對路基沉陷區進行分析和預測,最后論述了arcview軟件及其擴展模塊在沉陷區研究分析中的應用;第四,對汛期庫區線路災害的原因進行了分析,并探討了利用數量化理論對路基防護工程抗洪能力進行預測的意義;第五,提出從風險的角度對交通線路的防災減災進行管理,對風險估計的相關問題進行了論述,并探討了交通線路水害危險區段的劃分問題。