The technique of 3d visualization of terrain sight model is an important technique of spatial-temporal GIS and VR.
地形景观模型的三维可视化技术是时空一体化地理信息系统与虚拟现实中的关键技术。
In this paper, after analysis of the spatial and temporal properties of GIS, a semantic definition of spatiotemporal topological relationships has been suggested.
本文在分析GIS的时空特性后，给出了一个语义层时空拓扑关系定义。
The temporal and spatial distribution of traffic accidents and main influencing factors are found through analysis of road traffic accidents based on GIS technology.
通过GIS技术进行道路交通事故的时空分布分析，发现其在空间和时间上的分布规律及其主要影响因素。
According to the spatial and temporal characteristics of GIS-T data, this thesis has carried on the analysis and comparison of several existing spatiotemporal data model.
根据GIS - T数据所具有的时空特性，本文对现有的时空数据模型进行对比分析。
Then the temporal and spatial characteristics of population density change were analyzed based on GIS.
在人口密度模拟的基础上，用GIS对上海人口格网数据进行简要的空间分析。
Then the temporal and spatial characteristics of population density change were analyzed based on GIS.
在人口密度模拟的基础上，用GIS对上海人口格网数据进行简要的空间分析。
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