The global subdivision grid based on extended mapping division and its address coding

Currently, many global subdivision models and spatial data don't match seriously in their storage structure. The extended model based on mapping division(EMD) is designed to effectively implement management, organization and use of huge spatial data. This model made the hierarchical subdivision by longitude and latitude interval, based on traditional mapping division way to achieve the objectives of direct storage and index for existing spatial data. After the characteristics of these global subdivision models have been analyzed, the hierarchical structure of subdivision cell is introduced. Based on this structure, the multi-resolution address coding of subdivision cell is designed taking advantage of Hilbert curve and its address coding space is established. Theoretical research and experiment indicated that this subdivision model can represent and manage global multi-resolution spatial data more effectively.EI03295-3023