本文選題：線化簡(jiǎn) + 空間關(guān)系約束��； 參考：《測(cè)繪學(xué)報(bào)》2017年04期

【摘要】：線要素化簡(jiǎn)在制圖表達(dá)與綜合領(lǐng)域一直是研究的熱點(diǎn)和難點(diǎn)之一。然而,經(jīng)典化簡(jiǎn)算法多針對(duì)單獨(dú)線要素進(jìn)行處理,缺乏對(duì)該線要素與周邊線要素之間整體空間關(guān)系的考慮,并且,存在計(jì)算結(jié)果生硬(D-P算法)、局部極值點(diǎn)缺失,特別是在曲度較大之處出現(xiàn)相交異常(L-O算法)等問(wèn)題。為此,本文提出一種顧及空間關(guān)系約束的線化簡(jiǎn)算法,建立線要素全局化簡(jiǎn)方法(LGSM)和矢量位移、面積位移等5類評(píng)價(jià)指標(biāo)。采用等高線、河流和道路3類線要素實(shí)際數(shù)據(jù)進(jìn)行了試驗(yàn),充分檢驗(yàn)了本文算法的優(yōu)越性,其處理結(jié)果符合開(kāi)方根模型規(guī)律,降低了曲線復(fù)雜度,在保證全局空間關(guān)系不變條件下,不僅更好地保持了曲線整體形狀特征,而且光滑美觀、精度高。
[Abstract]:Line element simplification has always been one of the hot and difficult points in the field of cartographic representation and generalization. However, the classical simplification algorithm mostly deals with the single line element, which lacks the consideration of the overall spatial relationship between the line element and the peripheral line element. Moreover, there is a stiff D-P algorithm and the local extremum is missing. Especially when the curvature is large, there are some problems such as intersection anomaly and L-O algorithm. Therefore, this paper presents a linear simplification algorithm which takes into account the constraints of spatial relations, and establishes five kinds of evaluation indexes, such as global simplification of line elements (LGSM) and vector displacement and area displacement. By using the actual data of contour line, river and road, the superiority of this algorithm is fully tested. The processing result accords with the law of square root model and reduces the complexity of curve. Under the condition that the global spatial relationship is invariant, not only the whole shape of the curve is kept better, but also the curve is smooth and beautiful, and the precision is high.
【作者單位】： 山東科技大學(xué)測(cè)繪科學(xué)與工程學(xué)院;中國(guó)測(cè)繪科學(xué)研究院;東華理工大學(xué)測(cè)繪工程學(xué)院;
【基金】：國(guó)家科技支撐計(jì)劃(2015BAJ06B01) 測(cè)繪地理信息公益性行業(yè)科研專項(xiàng)(201512027) 國(guó)家基礎(chǔ)測(cè)繪項(xiàng)目(A1615)~~
【分類號(hào)】：P208
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本文編號(hào)：1850932