Public relation is the essence of urban planning which aim is to study methods and rules in layout or coordinate on PR according to spatial relation.
城市规划本质上是“公共关系”性的，它以“空间关系”为依托，研究各种“公共关系”布局或组织协调的方法与原则。
It also indicates that there are certain issues in the process of evolution of urban land layout and spatial form, and proposes some solutions to them.
分析中发现城市用地布局及空间形态变化过程中存在的问题，提出了解决问题的办法。
It offers all kinds of up-to-date spatial data sources for the whole urban, and it offers uniform and standard spatial data infrastructure for the layout building management and service of urban.
它为整个城市提供各种现势性的空间数据信息源，为城市规划、建设、管理和服务提供统一的、标准的空间数据基础框架。
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