本文選題：GIS　切入點(diǎn)：三維點(diǎn)符號(hào)　出處：《測(cè)繪科學(xué)》2017年07期

【摘要】：針對(duì)傳統(tǒng)的三維點(diǎn)符號(hào)庫(kù)實(shí)現(xiàn)方法工作量大、擴(kuò)展性差等問(wèn)題,提出了直接從二維矢量點(diǎn)符號(hào)到三維點(diǎn)符號(hào)的自動(dòng)建模方案。采用三維圖元的設(shè)計(jì)思路,解決符號(hào)擴(kuò)展性差的問(wèn)題。借鑒二維矢量點(diǎn)符號(hào)的表達(dá),來(lái)進(jìn)行三維符號(hào)的設(shè)計(jì)與建模,是對(duì)二維符號(hào)庫(kù)的資源再利用,有利于實(shí)現(xiàn)二三維符號(hào)庫(kù)的統(tǒng)一。通過(guò)設(shè)計(jì)內(nèi)存池及內(nèi)存拷貝的優(yōu)化策略來(lái)提高模型的可視化效率。實(shí)驗(yàn)結(jié)果表明,提出的方案不僅有較好的可視化效果,并且具有相關(guān)文件數(shù)據(jù)量小、符號(hào)的可擴(kuò)展性好等優(yōu)勢(shì),對(duì)三維GIS的符號(hào)庫(kù)研究具有重要的參考價(jià)值。
[Abstract]:Aiming at the problems of large workload and poor expansibility of the traditional 3D dot symbol library, an automatic modeling scheme from 2D vector point symbol to 3D point symbol is proposed.The problem of poor extensibility of symbols is solved by using the design idea of three-dimensional graphic elements.The design and modeling of 3D symbols based on the expression of two-dimensional vector point symbols is the reuse of the resources of the two-dimensional symbol library and is conducive to the unification of the two-dimensional and three-dimensional symbol libraries.The optimization strategy of memory pool and memory copy is designed to improve the visualization efficiency of the model.The experimental results show that the proposed scheme not only has good visualization effect, but also has the advantages of small amount of related file data and good scalability of symbols. It has important reference value for the study of 3D GIS symbol library.
【作者單位】： 北京林業(yè)大學(xué)信息學(xué)院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(TD2014-02)
【分類號(hào)】：P208
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本文編號(hào)：1691837