基于空间信息网络集成的全要素数据模型

Full Feature Data Model for Spatial Information Network Integration

首先针对空间信息网络集成中多数据模型集成的问题,分析了栅格、矢量和混合数据模型的特点,然后提出了一种按层次的矢量栅格一体化全要素模型。该模型将实现世界的所有对象均按层次以要素划分与描述,所有数据均以矢量方式进行组织,可以同时描述基于矢量、栅格、三维等模型的数据,克服了目前在空间信息网络集成应用中基于不同模型数据之间不能很好地集成、进行空间分析的缺点。最后构建并给出了点、线、面、体四种基本要素的具体数据结构,针对具体实例进行了分析与描述,并阐述了该模型的特点。

Firstly,in allusion to the difficulty of integrating different data models in integrating spatial information,the characteristic of raster model,vector model and mixed model is analyzed,and then a hierarchical full feature model that the vector and the raster are incorporate is put forward.In this model,all the objects in the real world are divided into and described as features by hierarchy,and all the data are organized in vector.This model can describe the data based on vector,raster,three-dimensional and other models,and avoid the disadvantage that it can not be magnificently integrated and performed spatial analysis between data based on different model in integrating spatial information. Finally,the visualized data structure of four basic features,point,line,surface and solid,is described,a visualized example is analyzed and described and then the characteristic of this model is described.