提高我国环境影响评价公众参与有效性的探讨

根据数字城市与空间信息基础平台的建设需要，以地理学第一定律为理论依据，给出核密度估计与网络核密度估计方法，对欧式空间和道路网络空间下的城市 POI设施分布特征进行实验分析，探讨其分布规律，并以可视化形式展示POI的分布热点、密度、趋势等分布特征，从宏观上获取城市基础设施的分布规律，为城市规划和管理提供决策支持。

Ana lysis and Visualization of POI Distribution Density Based on Urban Network Space

According to the construction needs of the digital city and spatial information infrastructure platform ,ker-nel density estimation and network kernel density estimation methods based on the first law of geography are introduced . The distribution characteristics of urban POI facilities in Euclidean space and road network space is analyzed and ex -plored experimentally .Through displaying hotspot ,density ,trend in a variety of visual methods ,we can achieve the macro distribution characteristic of urban infrastructures and provide the decision service for urban planning and management .