Using Data Grid Technology to Build MODIS Data Management and Distribution System Based on Spatial Information Grid

MODIS (Moderate Resolution Imaging Spectroradiometer) is an advance earth observation system, which is the world's best remote sensing data of free receiving. However, there is a serious problem about duplicated establishment of MODIS data receive station in China, and it has brought a tremendous waste of money. Utilizing data grid technology could take advantages to integrate and share heterogeneous and distributed MODIS data sources. This paper presents research work on building MODIS data management and distribution system based on Spatial Information Grid (SIG). We studied and implemented a three-layer structure for data interoperation, and designed the extensible XML-based spatial data access language to support heterogeneous data integration and cross-border data computation. Furthermore, we developed the MODIS data catalogue service to facilitate users and improve system performance. The research helps to release conflict between duplicated establishment of MODIS receiving station and less effectively data sharing, and enables researcher to focus on science, not on problems of data location, computing ability and data management.