本文關(guān)鍵詞： 拓?fù)渚植扛?拓?fù)鋽?shù)據(jù) 地理事件　出處：《西南石油大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著我國(guó)社會(huì)與經(jīng)濟(jì)建設(shè)的迅速發(fā)展,地理信息的不斷變化,人們對(duì)地理信息綜合服務(wù)的需求不斷提高,用戶對(duì)數(shù)據(jù)現(xiàn)勢(shì)性與內(nèi)容豐富性的要求也越來(lái)越高,數(shù)據(jù)的更新變得比數(shù)據(jù)庫(kù)的建設(shè)更為重要。地理空間數(shù)據(jù)的更新實(shí)質(zhì)是空間實(shí)體狀態(tài)及內(nèi)容改變的過(guò)程。空間實(shí)體的改變包括幾何關(guān)系、屬性信息、拓?fù)潢P(guān)系的改變,拓?fù)潢P(guān)系作為GIS中重要的空間關(guān)系,對(duì)空間數(shù)據(jù)的表達(dá)、存儲(chǔ)、查詢及分析等具有重要意義,且拓?fù)潢P(guān)系的局部更新技術(shù)對(duì)空間數(shù)據(jù)的高效處理及實(shí)時(shí)更新起著重要的作用。本文主要研究地理事件引起的拓?fù)鋽?shù)據(jù)的局部變化。通過(guò)研究地理實(shí)體發(fā)生的不同地理事件,分析判斷地理實(shí)體的變化情況。研究了地理事件變化引起的拓?fù)潢P(guān)系的改變和局部拓?fù)涓?通過(guò)基于地理事件的形式實(shí)現(xiàn)拓?fù)潢P(guān)系的局部更新。本文主要研究工作如下:(1)對(duì)地理空間數(shù)據(jù)、空間實(shí)體、空間關(guān)系的分類(lèi)、應(yīng)用等進(jìn)行研究。研究了點(diǎn)、線、面之間存在的6種空間關(guān)系,并分析了每種空間關(guān)系中包含的拓?fù)潢P(guān)系。對(duì)空間數(shù)據(jù)點(diǎn)/線、線/面拓?fù)潢P(guān)系的建立,及拓?fù)潢P(guān)系局部更新技術(shù)中結(jié)點(diǎn)、弧段的更新操作進(jìn)行了研究。(2)地理事件的發(fā)生,必然造成對(duì)周邊地理要素的影響,本文對(duì)每類(lèi)地理事件發(fā)生前后兩要素間的拓?fù)潢P(guān)系的變化情況進(jìn)行了分析,對(duì)拓?fù)鋽?shù)據(jù)的變化情況及拓?fù)潢P(guān)系的變化規(guī)律進(jìn)行分析,其實(shí)質(zhì)是圍繞點(diǎn)、線、面三類(lèi)實(shí)體的變化產(chǎn)生的。通過(guò)對(duì)受地理事件影響的點(diǎn)、線、面間的拓?fù)潢P(guān)系的變化及拓?fù)鋽?shù)據(jù)的對(duì)比分析,實(shí)現(xiàn)基于地理事件的拓?fù)渚植扛卵芯�。最終根據(jù)拓?fù)鋽?shù)據(jù)中結(jié)點(diǎn)、弧段的變化規(guī)律,將除新生事件和消亡事件外的其他地理事件歸納為新生事件和消亡事件的組合事件,這里視結(jié)點(diǎn)、弧段數(shù)量增加時(shí)發(fā)生新生事件,結(jié)點(diǎn)、弧段數(shù)量減少時(shí)發(fā)生消亡事件。(3)通過(guò)對(duì)結(jié)點(diǎn)和弧段的分類(lèi),實(shí)現(xiàn)提取發(fā)生拓?fù)渥兓牡乩硪?并選取需進(jìn)行拓?fù)涓碌膮^(qū)域范圍。根據(jù)數(shù)據(jù)的新建、刪除操作,對(duì)拓?fù)鋽?shù)據(jù)進(jìn)行拓?fù)渚庉?新生事件下進(jìn)行添加點(diǎn)、添加線的操作,消亡事件下進(jìn)行刪除點(diǎn)、刪除線的操作。并利用拓?fù)湓硬僮髅枋鐾負(fù)鋽?shù)據(jù)發(fā)生新生事件和消亡事件時(shí)的數(shù)據(jù)變化過(guò)程。(4)運(yùn)用第4章選取變化要素范圍和提取拓?fù)渥兓氐姆椒?對(duì)城市區(qū)域發(fā)生變化的地理要素進(jìn)行拓?fù)涞木植扛�。選取發(fā)生新生事件的區(qū)域和發(fā)生消亡事件的區(qū)域,更新變化要素的拓?fù)鋽?shù)據(jù)。
[Abstract]:With the rapid development of China's social and economic construction and the continuous changes of geographical information, people's demand for comprehensive geographic information services is increasing, and the users' demand for the present situation of data and the richness of content is becoming more and more high. The updating of data is more important than the construction of database. The essence of updating geospatial data is the process of changing the state and content of spatial entities. The change of spatial entities includes geometric relations and attribute information. The change of topological relationship, as an important spatial relation in GIS, is of great significance to the expression, storage, query and analysis of spatial data. The local updating technique of topological relation plays an important role in the efficient processing and real-time updating of spatial data. This paper mainly studies the local changes of topological data caused by geographical events. Same geographic event. The change of geographical entity is analyzed and the change of topological relation and local topological update caused by the change of geographical event is studied. This paper mainly studies the classification of geospatial data, spatial entities and spatial relations. In this paper, six kinds of spatial relationships among points, lines and surfaces are studied, and the topological relationships included in each spatial relationship are analyzed. The establishment of topological relationships between points / lines and lines / planes of spatial data is discussed. The update operation of nodes and arcs in the local updating technology of topological relation is studied. 2) the occurrence of geographical events will inevitably cause the influence on the geographical elements around them. This paper analyzes the change of the topological relation between the two elements before and after each kind of geographical event, and analyzes the change of the topological data and the law of the change of the topological relation. The essence of the change is around the point and the line. The changes of three types of entities are generated by the comparative analysis of the topological relationships and topological data of points, lines, and planes affected by geographical events. Finally, according to the change rule of nodes and arcs in topology data. In addition to the new events and extinction events, the other geographical events are classified as the combination events of the new events and the dead events, where the number of new events and nodes occur when the number of nodes and arcs increases. By classifying nodes and arcs, the geographical elements of topological changes are extracted, and the range of regions that need to be updated is selected according to the new data. Delete operation, topologically edit topology data, add points under new events, add line operations, delete points under death events. The operation of deleting lines. Using topological atomic operations to describe the process of data change during the occurrence of new and dead events in topological data. Chapter 4 is used to select the range of change elements and extract the topological change elements. The topological data of the changing elements are updated by selecting the region where the new event occurs and the region where the event of extinction occurs.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P208

【參考文獻(xiàn)】

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本文編號(hào)：1459904