顧及地形特征語義約束的高保真地形建模方法探索
[Abstract]:In the process of terrain modeling, the representation of the whole terrain feature is often lacking, which leads to the appearance of the distortion phenomenon that the terrain local feature in the current terrain model does not accord with the attribute of the terrain object. In this paper, the concept of terrain semantics is proposed to describe the local features of terrain, and the constraint of elevation in the region is realized through the formal expression of semantics. At the same time, the conceptual model of semantic DEM (S-DEM) is designed. Based on the data structure compatible with the existing grid DEM, a semantic interpolation method is implemented, and the three-dimensional representation of S-DEM is realized by building a three-dimensional prototype system. Compared with the traditional method, the S-DEM model ensures the consistency of terrain region features and terrain attributes, and ensures the expression of terrain local features and vertical faces. The results show that terrain semantics is essentially the embodiment of terrain object features and depends on the object-oriented representation of terrain in data structure.
【作者單位】: 合肥工業(yè)大學(xué)宣城校區(qū)信息工程系;南京師范大學(xué)虛擬地理環(huán)境教育部重點實驗室;
【基金】:國家自然科學(xué)基金項目(41401445、41371421) 安徽省自然科學(xué)基金項目(1508085QD76) 中央高;究蒲袠I(yè)務(wù)費(fèi)專項資金項目(J2014HGBZ0198)
【分類號】:P208
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