數值地形圖自動接邊與DLG-3資料結構之研究

Automatic Edge Matching for Digital Topographic Maps and the Data Structure of DLG-3

張長安(Chang-An Chang)

《地圖 ： 中華民國地圖學會會刊》 8期 (1997/12) Pp. 311-316

https://doi.org/10.30006/JC.199712.0026

摘要

受限於製圖工具及地圖投影理論製圖範圍之限制及使用方便之故，地圖之圖幅範圍受到限制。傳統紙圖之接邊採人工方式，且受限於圖紙伸縮、繪圖筆之粗細，甚或牽就強行與舊有紙圖進行接邊工作因而產生誤差。現代電腦製圖則可利用電腦以最佳之數學排序及查找理論進行圖幅邊界一定範圍內地形、地物之匹配(Matching)及接邊工作。本文以1:24000地形圖為例，DLG-3(Digital Line Graph-3)資料格式之DGN圖檔進行自動接邊實驗，其原理亦可適用於其他各比例尺之數值圖檔接邊工作；由於本研究之推演模式中，對於兩相鄰待匹配接邊圖幅，採比對屬性資料及幾何判釋圖形資料之方式，亦可間接達到檢視品管之效。

並列摘要

Due to the convenience for usage and the limitation of mapping tools and map projection theory, the size of maps are limited. The way for paper maps edgematching occurs the system error which includes the paper distortion, the drawing threshold and so on. However the mathematics sorting and searching algorithm are involved in digital map edge-matching for the features.
In this topic, the 1:24000 digital topographic map in DLG-3 data structure was experimented. The methodology of comparison for attributes & geomatric feature works not only edge-matching but also quality control mission.