【摘要】 在对地理数据建模过程研究的基础上,论述了地理数据引擎—GDE(geographicdataengine)的设计与实现,提出了独立于具体数据结构和文件格式的地理数据访问方法,从概念模型上论述了GDE的相关理论及设计策略,给出了此模型的具体实现。更多还原

【Abstract】 This paper describes the design and implementation of GDE(geographic data engine) based on the research of geographic data modeling, and provides method which is independent of the access to the specific data structure and file formation . Some theory involved in the GDE and design tactic have been discussed conceptually and the implementing processes of the GDE model has been presented.更多还原