【摘要】：在地質(zhì)體體元剖分、屬性插值中如何實(shí)現(xiàn)屬性模型和空間結(jié)構(gòu)模型的一致性,體現(xiàn)地質(zhì)知識(shí)的表達(dá),是一個(gè)難點(diǎn)問(wèn)題。融合邊界表示法和角點(diǎn)網(wǎng)格模型,以B-Rep表達(dá)地質(zhì)體空間形態(tài),以角點(diǎn)網(wǎng)格模型離散化地質(zhì)體,建立地質(zhì)體三維結(jié)構(gòu)模型及其屬性模型。充分考慮到地質(zhì)原理和相關(guān)的地質(zhì)約束條件,對(duì)位于斷層面兩邊同一地層插值時(shí),采用"距離環(huán)繞法"求點(diǎn)對(duì)距離參與插值計(jì)算。在地質(zhì)體建模時(shí)引入"等時(shí)地層"的概念,縱向上采用分層插值的方式對(duì)屬于同一等時(shí)地層的地質(zhì)體屬性數(shù)據(jù)進(jìn)行求值,橫向上采用分區(qū)域插值的方法,通過(guò)提取沉積相邊界來(lái)添加控制線約束插值,很好地解決了地質(zhì)體結(jié)構(gòu)模型對(duì)地質(zhì)體屬性模型的插值約束問(wèn)題。將理論與實(shí)踐相結(jié)合,利用福州三維城市地質(zhì)數(shù)據(jù),將基于角點(diǎn)網(wǎng)格的體元模型和三維屬性插值算法實(shí)際應(yīng)用到三維城市地質(zhì)系統(tǒng)的建模中。
[Abstract]:How to realize the consistency of attribute model and spatial structure model and how to express geological knowledge is a difficult problem in geological volume element division and attribute interpolation. The boundary representation method and the corner mesh model are combined, the spatial shape of geological body is expressed by B-Rep, the geological body is discretized by corner grid model, and the 3D structure model and attribute model of geological body are established. Considering the geological principle and the related geological constraints, the "distance surround method" is used to calculate the distance of the same strata on both sides of the fault plane. The concept of "isochronous stratigraphy" is introduced in the modeling of geological bodies. The method of stratified interpolation is used to evaluate the attribute data of geological bodies belonging to the same isochronous strata, and the method of regional interpolation is used in horizontal. By extracting sedimentary facies boundary and adding control line constraint interpolation, the interpolation constraint problem of geological body structure model to geological body attribute model is solved well. Combining theory with practice, the volume element model based on corner grid and 3D attribute interpolation algorithm are applied to 3D urban geological system modeling by using Fuzhou 3D urban geological data.
【作者單位】： 北京大學(xué)地球與空間科學(xué)學(xué)院;中國(guó)地質(zhì)大學(xué)(武漢)計(jì)算機(jī)學(xué)院;中國(guó)地質(zhì)大學(xué)(武漢)智能地學(xué)信息處理湖北省重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家863計(jì)劃重點(diǎn)項(xiàng)目課題(2012AA121401) 國(guó)家自然科學(xué)基金項(xiàng)目(41172300)
【分類(lèi)號(hào)】：P628

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