解放以来,北京市发生了巨大变化。现在城市绿化状况如何?是人们十分关心的问题。绿化覆盖率、绿化分布与低层气候的关系怎样?大气污染的关系怎样?这些是关系到城市规划和城市发展的重要问题。我们试图利用遥感资料绘制树木绿地分布图,计算规划市区的绿化覆盖率,从而为城市规划、绿化管理和城市生态研究提供基础资料。 Since the liberation, great changes have taken place in Beijing. What is the status of urban greening? It is a matter of great concern to the people. What is the relationship between green coverage, green distribution, and low-level climate? What is the relationship between air pollution? These are important issues that concern urban planning and urban development. We have attempted to use remote sensing data to draw maps of tree green areas and calculate the green coverage rate of planned urban areas so as to provide basic data for urban planning, afforestation management, and urban ecological research.