本文選題：等值線 + 多義性��； 參考：《計(jì)算機(jī)輔助設(shè)計(jì)與圖形學(xué)學(xué)報(bào)》2017年09期

【摘要】：為了快速從海量水深數(shù)據(jù)中提取等深線,提出一種基于線段結(jié)點(diǎn)排序的等深線快速生成算法.首先對(duì)三角網(wǎng)生成等深線過程中由剖分方式引起等深線連接的多義性問題進(jìn)行分析,并在確保航行安全的原則下提出改進(jìn)的剖分規(guī)則優(yōu)化三角網(wǎng);然后遍歷每個(gè)三角單元并提取等深線段,將提取的等深線段與已生成的等深線段根據(jù)結(jié)點(diǎn)位置關(guān)系進(jìn)行排序;最后根據(jù)排序結(jié)果將等深點(diǎn)按順序連接成等深線.實(shí)驗(yàn)結(jié)果表明,該算法提取的等深線能夠正確表達(dá)海底地形,且具有較高的效率,可應(yīng)用于海量水深數(shù)據(jù)的等深線生成.
[Abstract]:In order to extract the isobath from the massive water depth data quickly, a fast algorithm of generating isobath based on the sorting of line segment nodes is proposed. Firstly, the problem of the ambiguity of isobath connection caused by the way of dividing is analyzed in the process of generating isobath in triangulation network, and an improved rule of triangulation is put forward to optimize the triangulation network under the principle of ensuring the safety of navigation. Then traversing each triangular unit and extracting the isobath segment, the extracted isobath segment and the generated isobath segment are sorted according to the node position relationship. Finally, the isobath points are connected into isobars in order according to the sorting results. The experimental results show that the isobath extracted by this algorithm can represent the sea floor topography correctly and has a high efficiency. It can be used to generate the isobath of massive water depth data.
【作者單位】： 信息工程大學(xué)地理空間信息學(xué)院;地理信息工程國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：地理信息工程國家重點(diǎn)實(shí)驗(yàn)室開放基金(SKLGIE2015-M-4-1) 某“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(613317)
【分類號(hào)】：P229

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