GIS played an important role in this field by its good function of multi-source data integration, spatial analysis and decision-aiding.
GIS提供的多源数据集成能力、强大的空间分析能力和辅助决策能力在公共安全的预警预报、监测、灾情评估中发挥了重大作用。
The spatial decision in GIS analysis needs tools and information collection.
在GIS分析的空间决策需要的工具和信息收集。
The observer sitting problem is important in terrain visibility analysis and is widely used in spatial information aid decision, telecom, and animal protection and so on.
观察点设置问题是地形可视性分析中的一类重要问题，在空间信息辅助决策、电信、野生动物保护等领域有着广泛的应用。
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