ACCESSING REMOTE SENSING INFORMATION THROUGH STANDARDOBJECT INTERFACES

摘要

Downloading and processing remotely sensed data such as satellite imagery areexpensive in terms of computing requirements and human expertise. A more efficientway of providing information services is through standard object interfaces in adistributed network. The author proposes a system architecture that incorporatesOpenGIS specifications in middleware objects that encapsulate remote sensing data andoperations. These middleware objects enable client applications obtain services throughstandard interfaces regardless the file formats and application platforms used toimplement the services. End users access remote sensing data and functionality throughweb browsers or GIS applications in a single, integrated, and virtual system. Objects indifferent systems developed with this architecture can connect with one another throughthe standard interfaces for interoperable applications. OpenGIS Specification for Grid isused as interfaces for the middleware objects. Implementation of the objects can bedelegated to commercial software packages. The proposed system takes advantage of theevolving interoperability-enabling technology such as CORBA and DCOM.