Spatial data model is the core and base of three dimensional geographic information system design.
空间数据模型是地理信息系统设计的核心和基础。
The groundwater system of Yancheng in Jiangsu Province is a compound aquifer system, three dimensional numerical model is applied and deals with it as inhomogeneous anisotropy aquifer in spatial.
江苏省盐城市地下含水系统为一复合含水层系统，采用真三维模型，将其概化为三度空间上的非均质各向异性。
In the first part, a measuring system of three-dimensional motions of spine was established with computer stereovision model.
本研究分两部分，第一部分以计算机立体视觉为模型建立脊柱三维运动测量系统。
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