国家1∶50000数据库更新工程总体设计研究与技术创新

Master Design and Technical Development for National 1∶50000 Topographic Database Updating Engineering in China

为了全面提高1∶50000数据库的信息现势性和要素完整性,我国"十一五"期间组织实施了国家1∶50000数据库更新工程。介绍该工程总体技术研究与技术创新工作,包括研究设计以地形数据全要素更新、全区域变化检测和全过程质量控制为主要特征的1∶50000数据库全面更新模式,研究提出符合我国大面积快速更新实际需要的缩编更新优先、影像一体化更新为主的主体更新方法,设计研制规模化更新所需的生产技术系统,制定配套的生产技术规定,建立规模化更新生产业务体系,并在全国大规模更新生产中广泛使用。

The currency of geographic data refers to its consistency with respect to the real world, and plays a critical role in geographic information service and applications. In order to improve the quality of geographic information service, State Bureau of Surveying and Mapping of China had launched a five year＇s national campaign to update 1 ： 50000 topographic database. This paper outlines the master design and technical development of this national updating engineering, which adopts a full coverage updating strategy characterized by all element topographic data modeling, change detection in all related areas, and whole process data quality controlling. High resolution image-based updating and large-scale data generalization-based updating were developed and used as two majors updating techniques, a series of technical production specifications were made. Based on the above, a technical system for large scale updating production, mainly including image based updating software and data generalization based updating software, has been developed and equipped to a large number of production units. The new technical production system has been successfully implemented in national campaign to update 1 ： 50 000 topographic database.