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The development and application of GIS ultimately creates the demand for spatial information security, and access control is our primary concern. Spatial information is mostly stored and managed by da...
The paper firstly introduces grid technology and spatial database. Secondly it has designed the spatial database model in grid environment, which contains Application layer, Collective Layer and Fabri...
The technologies of organization and management of the massive volume spatial data are playing an important role in GIS. Especially,with the increasing of the volume of spatial data and the extending ...
Technological development in the field of map and spatial database generalization is very fast, following the trend from manual cartography to computer-based cartography. Map generalization is an int...
With the development of the Database technology and Geographic Information System technology, the spatial data managing mode go through three stages, entirely File system management, File system and ...
The GIS is a tool that allows us to study the logic of the distribution of phenomena that occur on the Earth’s surface. In this article, we propose exploring its potential for historical research over...
GIS assist in specific planning and decision-making processes in irrigation through the input, spatial analysis and output of relevant information. The real strength of GIS is its ability to integrate...

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