基于Morse復(fù)形的地表形態(tài)建模及應(yīng)用研究
[Abstract]:Topographic description and representation is one of the key problems in geoscience and spatial informatics. As an accurate geometric description, digital elevation model (Dem) can not reveal the characteristic information of terrain surface directly, and sometimes it has a lot of data redundancy, but the surface topological data structure can describe the surface compact and succinctly. In this paper, based on Morse complex, some key technical problems involved in the construction of surface morphology model and its simplified application in regular grid Dem are discussed. The main research contents are as follows: aiming at the traditional algorithm of constructing local surface shape model, an improved algorithm is proposed to avoid the intersection of valley line and ridge line at regular points, and the algorithm is extended to the global surface. In this paper, the differences between local surface and global surface in morphological modeling are summarized, and the method of surface morphological modeling is improved, and an adaptive algorithm based on topology simplification is proposed to select the important terrain points of regular grid Dem. Finally, an experimental prototype system based on GTOPO30 SRTM data is designed and developed, which verifies the correctness and feasibility of the proposed algorithm.
【學(xué)位授予單位】:中國礦業(yè)大學(xué)(北京)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:P208
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