关键词: GIS, 数据库, 数据组织, 查询检索

Abstract:

GIS application in government agencies opens up a specialized research field and the General Provincial Situation GIS is one of the important research contents. Organization and management of billions of data with multi-scaled and multi-temporal characteristics, composed of vector data, image data and DEM data, is the key issue in giving the field a push to develop rapidly and be applied practically. And the system must make the strict demand on security of data. In order to provide consultation service for leaders to immediately make a strategic decision, the data organization in this paper breaks away from the constraint of the traditional map management, which has some evidently shortcomings that are unfavorable for querying and indexing information of some administrative units. As a result, the seamless spatial data organization scheme based on administrative units is put forward to organize the vector data and the snapshot model is used to process the temporal data. So all data are stored according to administrative units. And data of different scales are stored in different databases and the image data and DEM data are stored separately in line with blocks. Consequently, querying and indexing to all data can be done according to different administrative units, different scales, time (temporal resolution), different object classifications,image or DEM blocks,etc. and the speed to query and index is improved distinctly.

Key words: GIS, database, data organization, querying and indexing