The Analysis of Multi-dimension Spatial Data Subdivision and Storage

With the development and integration of the technology in observing Earth from space, lots of information access of three-dimension geographical space and capability of updating has been developed rapidly. The application of Earth science has changed from three-dimension to multi-dimension. Therefore, the processing and storage of multi-dimension spatial data become more and more important. The paper puts forward the conception of spatial data subdivision according to the shape character of Earth and a subdivision model has also been offered. In this model, each subdivision unit has been named patch. The granularity of the patch can be designated according to actual data requirement. The smaller of granularity of the subdivision you select, the higher of precision of the patch it will be, and the more precise of the earth information the patch expresses. On the basis of patch subdivision, a new storage strategy of patch data has been put forward. Firstly, the address is the basic unit of patch data storage. The patch is in touch with storage address according to time and space. Secondly, the patch storage emphasizes on dynamic storage. The subdivision patch data will be stored on-line, break-line and off-line. Finally, the storage of patch data is also processed in multilevel and multilayer. The paper provides a new searching method and theory in Earth subdivision data processing, but there are many problems are up for perfected and developed in the future.