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Focusing on the national fundamental geography information database, this article puts forward the construction of multi-level model in allusion to the status quo of the spatial data model, and defines the layered structure of multi-level model, thus reducing the strength and stress of building GIS spatial database. Besides, it also founds a mapset model mathematics basis, on which defines an extended...
This paper introduces the concept of the two-phase seamless integration model (2P-SIM), which is a general model to describe and solve the seamless integration problem of spatial data in the distributed heterogeneous environment. The first phase of this model deal with the classify progress; after this phase spatial data participate in seamless integration is split into respective groups, each group...
Catalogue technology has been widely used in spatial information organization, management and retrieval; it also plays vital effect in geography information system in organizing distributed and various spatial data resources. However, recent ways to describe catalogue tree, such as xml or database tables, lead fixed structure which is difficult to change, reuse and extend when facing masses of real-time...
The seamless integration and fusion of current multisource and heterogeneous spatial data in the open and distributed environments is still a crucial task and has strong application requirements. Nowadays, heterogeneous data resource in different region can be shared but cannot be used through a uniform way. This paper adopts a novel and converse cognize process on real world, and puts forward an...
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