本文選題：數(shù)字線劃地圖　切入點：數(shù)據(jù)管理　出處：《長安大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：數(shù)字線劃圖(DLG)和地圖是表達地理要素的兩種重要形式，前者用矢量骨架和屬性來表達地理要素，后者是一個區(qū)域內(nèi)地理要素符號的集合，二者具有對應(yīng)性，這使得數(shù)字線劃圖和地圖的一體化成為可能。目前測繪行業(yè)對這兩種數(shù)字產(chǎn)品的作業(yè)方式是先生產(chǎn)DLG數(shù)據(jù)，再進行地圖制圖，導(dǎo)致兩種數(shù)據(jù)無法進行同步更新；在應(yīng)用上，數(shù)字線劃圖和地圖采用的數(shù)據(jù)庫不同，使得對于二者應(yīng)用的拓展變得困難；在管理上，DLG數(shù)據(jù)與地圖符號數(shù)據(jù)在數(shù)據(jù)模型上的不一致，嚴重影響建庫與制圖的效率。如何在統(tǒng)一框架下對DLG數(shù)據(jù)與地圖數(shù)據(jù)進行有效管理成為當務(wù)之急。為解決這一問題，本文對其中涉及的一系列問題進行研究。 本文針對數(shù)字線劃地圖的管理，從數(shù)據(jù)統(tǒng)一存儲、查詢、表達三個方面展開研究。首先，，在對傳統(tǒng)空間數(shù)據(jù)管理方式的分析基礎(chǔ)上，基于面向?qū)ο蟮乃枷�，對利用關(guān)系數(shù)據(jù)庫管理空間數(shù)據(jù)的模式進行拓展，統(tǒng)一存儲數(shù)字線劃地圖的空間、屬性數(shù)據(jù)和地圖符號數(shù)據(jù)。其次通過對標準SQL語言的擴展，解決標準SQL語言無法進行空間數(shù)據(jù)操縱的問題，實現(xiàn)空間要素的幾何、屬性及符號圖形數(shù)據(jù)間的互查詢操作。最后，在對數(shù)字線劃地圖中各種組成元素特點進行分析的基礎(chǔ)上，分別針對圖形、文字、圖像及符號數(shù)據(jù)進行描述與表達。根據(jù)圖形、文字和圖像數(shù)據(jù)類型的各自特點，分別進行不同數(shù)據(jù)結(jié)構(gòu)設(shè)計，同時利用PostScript語言對地圖符號數(shù)據(jù)進行參數(shù)化描述。 本文實現(xiàn)了空間數(shù)據(jù)與地圖符號在統(tǒng)一框架下的管理，得到了通過拓展關(guān)系數(shù)據(jù)庫與標準SQL語言完成數(shù)據(jù)統(tǒng)一管理與操縱的方法。文中提出了DLG數(shù)據(jù)與地圖符號數(shù)據(jù)的一體化管理的解決方案，并在此基礎(chǔ)上進行了實際數(shù)據(jù)管理的設(shè)計與測試，驗證了該方案在一體化數(shù)據(jù)管理中的可行性。
[Abstract]:Digital line map (DLG) and map are two important forms of expressing geographical elements. The former uses vector skeleton and attributes to express geographical elements, and the latter is a collection of geographical element symbols in a region. This makes it possible to integrate digital line mapping and mapping. At present, the mapping industry is to produce DLG data first, then map mapping, resulting in the two kinds of data cannot be updated synchronously. The different databases used in digital line drawing and map make it difficult to expand their application, and the management of DLG data and map symbol data is inconsistent in data model. How to effectively manage DLG data and map data under the unified framework is an urgent task. In order to solve this problem, a series of problems are studied in this paper. In this paper, the management of digital line map is studied from three aspects: unified data storage, query and representation. Firstly, based on the analysis of the traditional spatial data management, the paper is based on the idea of object oriented. The model of managing spatial data by relational database is extended, and the spatial, attribute data and map symbol data of digital line map are stored uniformly. Secondly, by extending the standard SQL language, To solve the problem that the standard SQL language can not manipulate spatial data, and to realize the interquery operation of geometric, attribute and symbolic graphic data of spatial elements. Finally, on the basis of analyzing the characteristics of various elements in digital line map, According to the characteristics of graphic, text and image data types, different data structures are designed. At the same time, we use PostScript language to parameterize the map symbol data. This paper realizes the management of spatial data and map symbols under the unified framework. The method of unified data management and manipulation by extending relational database and standard SQL language is obtained. The solution of integrated management of DLG data and map symbol data is put forward in this paper. On this basis, the design and test of the actual data management are carried out, and the feasibility of the scheme in the integrated data management is verified.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P208

【引證文獻】

相關(guān)期刊論文 前1條

1 楊珍;張永志;張文軍;;數(shù)字線劃地圖建模中所遇問題分析[J];測繪工程;2016年05期

本文編號：1645060