本文關(guān)鍵詞： 范圍更新 要素更新 地圖信息量 地形圖　出處：《測(cè)繪通報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：隨著城市建設(shè)的快速發(fā)展,基礎(chǔ)地形圖數(shù)據(jù)的管理與自動(dòng)化更新得到國(guó)土規(guī)劃部門的高度重視。基于范圍(圖幅)的更新方法易于實(shí)現(xiàn)、效率高,但因重復(fù)更新無變化要素,容易導(dǎo)致歷史數(shù)據(jù)庫冗余。而基于要素的更新方法雖然只更新變化要素,但復(fù)雜的變化信息檢測(cè)使其不適用于變化量較大的更新。針對(duì)當(dāng)前更新技術(shù)無法自適應(yīng)選擇更新方法的問題,本文提出了基于地圖信息變化量的地形圖更新方法,即在選取更新方法前計(jì)算地圖信息量變化率,以此作為更新方法的選取依據(jù)。以多組1∶2000的居民地面數(shù)據(jù)為試驗(yàn)數(shù)據(jù),分析驗(yàn)證了本方法能有效地提高數(shù)據(jù)更新效率。試驗(yàn)發(fā)現(xiàn),當(dāng)變化率小于20%時(shí)采用基于要素的更新方法,大于55%時(shí)采用基于范圍的更新方法具有更高的更新效率,而處于20%~55%時(shí),兩種方法的更新效率沒有顯著差異。試驗(yàn)結(jié)果對(duì)地形圖更新方案的設(shè)計(jì)具有重要參考價(jià)值。
[Abstract]:With the rapid development of urban construction, land planning departments attach great importance to the management and automatic updating of basic topographic map data. The updating method based on scope (map) is easy to realize and efficient. However, it is easy to cause redundancy in historical database because of repeated updating of unchanged elements, while the updating method based on elements only updates the changing elements. However, the complex change information detection makes it not suitable for the update with a large amount of change. Therefore, the current update technology can not adaptively choose the updating method. In this paper, a topographic map updating method based on the variation of map information is proposed, that is, the change rate of map information is calculated before the updating method is selected. This is taken as the basis for the selection of the updating method. Taking many groups of resident ground data of 1: 2000 as experimental data, it is verified that this method can effectively improve the efficiency of data updating. The experiment found that this method can effectively improve the efficiency of data updating. When the rate of change is less than 20, an element based updating method is adopted, and when greater than 55, the range based updating method has a higher updating efficiency, and is in the range of 20 to 55. There is no significant difference in the renewal efficiency between the two methods. The experimental results have important reference value for the design of topographic map updating scheme.
【作者單位】： 中山大學(xué)地理科學(xué)與規(guī)劃學(xué)院;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41431178);國(guó)家自然科學(xué)基金面上項(xiàng)目(41671453) 廣東省自然科學(xué)基金重點(diǎn)項(xiàng)目(2016A030311016)
【分類號(hào)】：P283.5;P208
【正文快照】： 隨著各大中城市系列比例尺地形圖數(shù)據(jù)庫建設(shè)的完成,數(shù)據(jù)現(xiàn)勢(shì)性問題逐漸成為用戶關(guān)注的熱點(diǎn),并對(duì)大比例尺地形圖數(shù)據(jù)庫提出了“持續(xù)更新”的要求[1]。動(dòng)態(tài)更新技術(shù)是維護(hù)空間數(shù)據(jù)庫現(xiàn)勢(shì)性的主要手段[2],學(xué)者們先后提出了基于版本的更新[3]和基態(tài)修正的增量更新模型[4]。從更新

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本文編號(hào)：1469005