Research And Application Of Multi Source Remote Sensing Metadata Aggregation Technology

With the rapid development and the application of remote sensing satellite technology,the multi-spectral,multi-angle,multi-temporal,multi-spatial resolution data platform for different remote sensing satellites has been established on a global scale,and thus an earth observation system for obtaining multi-source remote sensing data has been formed.It’s unable to satisfy the demand of ever-increasing application areas and ever-increasing application levels,only through the provision of data from a single data source.It will be the main research direction of remote sensing data services in the future to better implement remote sensing data sharing and multi-agency collaborative services.This paper takes multi-source heterogeneous remote sensing metadata integration system as the research object,summarizes and analyzes the data integration methods at home and abroad,and proposes a data integration solution based on middleware and Web Service,which provides users with a one-stop inquiry service to ensure the independence and integrity of the original data source systems.Firstly,according to the heterogeneity of different remote sensing metadata,the author investigated and analyzed several commonly used spatial metadata standards at home and abroad,and developed a set of remote sensing core metadata specifications in combination with the characteristics of remote sensing data and system requirements.Then the author proposed that the metadata adapter component can solve the problem of data conflict in the integration of heterogeneous remote sensing metadata.Secondly,the technology of multi-source remote sensing metadata integration was studied.Several commonly used data integration models were compared.A data integration solution which based on middleware technology and Web Service technology was proposed to achieve the seamless integration of multi-source heterogeneous remote sensing.By analyzing the multi-level and heterogeneity of data sources,the classification criteria of remote sensing data sources which based on data source service model are established.The automatic construction mechanism of nodes is designed for each type of data source,and the rapid establishment of data source nodes is realized.Finally,based on the above analysis and research,a system of multi-source heterogeneous remote sensing metadata integration was designed and implemented,and the expected results of the research were achieved.