Map digitizing data quality control method 地圖數(shù)字化數(shù)據(jù)質(zhì)量控制方法
At present , the theory and application of topographical mapping system is quite mature . more of them reached the criterion of topographical map and the requirement of map digitizing . however , the deeper application and conversion of digital map to gis are ignored 目前,以單純成圖為目的測量繪圖平臺開發(fā)的理論和應(yīng)用已經(jīng)比較成熟,大多數(shù)的繪圖平臺已經(jīng)基本實現(xiàn)了地形圖圖示上的繪圖要求,能滿足測繪部門數(shù)字成圖的需要。
Topographical maps are the principal frame form of gis , and realization map digitizing and offering gis basic spatial data is one of the important research fields in surveying and gis , which is also necessity of development of science and technology . based on building gis - oriented topographical mapping system theories , this themes apply the advanced objectarx technology , aim at topographical mapping and exporting to gis , and resolve several key problems , such as symbols analysis and building , dtm and contour line automatic drawing , topographical map adjoining , digital image rectifying etc . and it offers models and arithmetic , realizing the general functions of gis - oriented topographical mapping system 本文以建設(shè)面向gis的測量繪圖平臺理論為基礎(chǔ),以autocad平臺下objectarx開發(fā)技術(shù)為核心,圍繞地形圖的成圖和入庫( gis數(shù)據(jù)庫)這一課題,對其中的關(guān)鍵技術(shù)難題? ?符號庫的建立與實現(xiàn)、 dtm與等高線的自動繪制、地形圖接邊、數(shù)字化柵格圖像的定向與糾正、接口數(shù)據(jù)文件的生成等進(jìn)行了研究分析,提出了相應(yīng)的模型和算法,實現(xiàn)了面向gis的測量繪圖系統(tǒng)的基本功能。
Characteristic and application of gis firstly . secondly it introduced the designing frame of uiims , achieving of the sub - - function and the pattem of the application . it emphasizes on the principle of the map digitizing , the foundation of the data model and encoding means , the construction of the topology data structure , the theory of different format data convertion 本文首先介紹了地理信息系統(tǒng)的研究現(xiàn)狀、技術(shù)背景、特點及應(yīng)用;其次介紹了城市基礎(chǔ)設(shè)施信息管理系統(tǒng)設(shè)計框架、具體功能的實現(xiàn)原理及應(yīng)用模式,其中重點分析了地圖數(shù)字化原理、數(shù)據(jù)模型的建立及其編碼方法、拓?fù)鋽?shù)據(jù)結(jié)構(gòu)的建立、不同格式的數(shù)據(jù)相互轉(zhuǎn)換原理。