3D simulation of soft geo‐objects
3D simulation of soft geo‐objects
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DOI：
10.1080/13658810500287149
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发表时间：
2006-03
影响因子：
5.7
通讯作者：
D. Shen;K. Takara;Y. Tachikawa;Yuling Liu
中科院分区：
文献类型：
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作者：
D. Shen;K. Takara;Y. Tachikawa;Yuling Liu
在几何方面，现有的3D GIS建模方法可以分为三种类型：基于表面的，基于体积的和混合的。这些方法适用于表示刚性地质对象，但到目前为止，还没有理想的GIS建模方法来模拟流动的水和土壤等软地质对象。本研究采用GIS流元（FE）和GIS软体素（SV）模拟地表径流和土壤侵蚀。GIS FE的长度与坡面流的速度成正比，而GIS FE的倾角代表坡面流的方向。GIS SV由隐函数生成，可用于创建平滑表面。这项研究表明，GIS FE可以真实地表示软地质对象的动力学和随机性，而GIS SV可以模拟软地质对象的变形。此外，这两种方法都可以反映地球科学规律，因为三维场景的动画是由地球科学模型控制的。
In terms of geometry, existing approaches for 3D GIS modelling can be classified into three types: surface‐based, volume‐based, and hybrids. These approaches are suitable for representing rigid geo‐objects, but so far there are no ideal GIS modelling methods for simulation of soft geo‐objects such as flowing water and soil. In this study, a GIS flow element (FE) and GIS soft voxel (SV) were used for simulation of overland flow and soil erosion. The length of a GIS FE is directly proportional to the velocity of overland flow, while the inclination of a GIS FE represents the direction of overland flow. The GIS SV is generated by implicit functions, which can be utilized to create a smoothed surface. This study reveals that GIS FEs can realistically represent the dynamics and stochastics of soft geo‐objects, while GIS SVs can simulate deformation of soft geo‐objects. Moreover, both of these approaches can reflect geoscientific laws because the animation of 3D scenarios is controlled by geoscientific models.