Geographic Problem-Solving Oriented Data Representation Model
Fei Guo · 2009
Extensible Geographic Environments(XGE) is a collaborative modeling environment which is designed for cooperative modeling by experts from different domains.In order to solve the problem of using multi-source heterogeneous data in XGE,a data representation model which named as XGE-DRM is proposed in this paper.Based on study of expression approach and organization criterion about multi-source,heterogeneous and multi-domain geo-data,XGE-DRM is divided into two levels,i.e.: the atom representation level and the object representation level.Prototype,semantic,metadata,expression,spatial reference and unit about data expression are discussed in atom representation level,and the expressions about relationships among data are also mentioned.The expression of geo-Entity is studied in the object representation level considering atom expression.In this level,each Entity has different aspects;each aspect is designed for different research domains,and can be saved as template with XML technology for reuse.Based on XGE-DRM,data construction and semantic can be parsed by a uniform way,and can be explicitly expressed.Owning to legible expression for data construction and semantic,geo-data can be shared expediently by different actors in collaborative modeling environment such as data owner and model builders who expressing their data and converting data from different kinds of data which is heterogeneous.Lastly an experiment about groundwater mining was designed in this paper;it involves integration of time series model and groundwater model.The experiment has shown that this XGE-DRM can meet the requirement of commom expression and efficiently using of geo-data,and it can support the geographic problem-solving oriented modeling environments.