發(fā)布時間：2018-03-03 13:25

  本文選題：沙地符號　切入點：MapGIS平臺　出處：《西安電子科技大學》2013年碩士論文　論文類型：學位論文

【摘要】：數(shù)字地圖矢量化是信息領域一個熱門的研究課題，也是建立地理信息系統(tǒng)的一個必要步驟。沙漠地圖矢量化是地圖矢量化中的重要部分，該研究主要關注于沙漠地區(qū)線性元素的信息。但是沙漠地圖中的沙地類型符號嚴重影響了線性信息的矢量化效率和結果。 針對上述問題，本文提出了兩種沙漠符號去除新算法，并將其集成到MapGIS平臺下。本文主要的研究工作和創(chuàng)新點如下： 1.針對沙漠地圖圖像中出現(xiàn)的沙地類型符號的特點、相互位置關系，通過將原始地圖圖像轉換為二值圖像，再經(jīng)過細化處理后，使用連通域閾值過濾以及像素跟蹤算法完成對平沙地符號和窩狀沙地符號的去除。同時，，算法最大程度保留了圖像中線性元素本來的特征，如方向和形狀，維持了信息的完整性。 2.在研究算法理論的基礎上，將理論與實際應用相結合，將該算法集成到MapGIS遙感測繪平臺中，并且通過工具欄按鈕的形式向用戶提供。通過簡單的參數(shù)設置，用戶就能夠使用該方法有針對性進行圖像處理工作。 通過算法理論的不斷完善和在實際工作的檢驗，該算法獲得良好效果，很大程度上提高了矢量化工作效率。
[Abstract]:Digital map vectorization is a hot research topic in the field of information, and it is also a necessary step in the establishment of geographic information system. Desert map vectorization is an important part of map vectorization. This study focuses on the information of linear elements in desert area, but the symbol of sand type in desert map seriously affects the vectorization efficiency and result of linear information. To solve the above problems, two new desert symbol removal algorithms are proposed and integrated into the MapGIS platform. The main research work and innovation of this paper are as follows:. 1. According to the characteristics of sand land type symbols in desert map images, the original map images are transformed into binary images, and then refined after processing. The connected domain threshold filtering and pixel tracking algorithm are used to remove the symbols of flat sand and nest sand. At the same time, the original features of linear elements in the image, such as direction and shape, are preserved to the maximum extent. The integrity of the information was maintained. 2. Based on the research of the algorithm theory, the algorithm is integrated into the MapGIS remote sensing surveying and mapping platform by combining the theory with the practical application, and it is provided to the user through the form of the toolbar button. The user can use the method to deal with the image. Through the continuous improvement of the algorithm theory and the test of practical work, the algorithm obtains good results, and greatly improves the efficiency of vectorization.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：P208;TP391.41

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本文編號：1561215