【摘要】：在地質(zhì)體體元剖分、屬性插值中如何實現(xiàn)屬性模型和空間結(jié)構(gòu)模型的一致性,體現(xiàn)地質(zhì)知識的表達,是一個難點問題。融合邊界表示法和角點網(wǎng)格模型,以B-Rep表達地質(zhì)體空間形態(tài),以角點網(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,對位于斷層面兩邊同一地層插值時,采用"距離環(huán)繞法"求點對距離參與插值計算。在地質(zhì)體建模時引入"等時地層"的概念,縱向上采用分層插值的方式對屬于同一等時地層的地質(zhì)體屬性數(shù)據(jù)進行求值,橫向上采用分區(qū)域插值的方法,通過提取沉積相邊界來添加控制線約束插值,很好地解決了地質(zhì)體結(jié)構(gòu)模型對地質(zhì)體屬性模型的插值約束問題。將理論與實踐相結(jié)合,利用福州三維城市地質(zhì)數(shù)據(jù),將基于角點網(wǎng)格的體元模型和三維屬性插值算法實際應(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;中國地質(zhì)大學(xué)(武漢)計算機學(xué)院;中國地質(zhì)大學(xué)(武漢)智能地學(xué)信息處理湖北省重點實驗室;
【基金】：國家863計劃重點項目課題(2012AA121401) 國家自然科學(xué)基金項目(41172300)
【分類號】：P628

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