The architecture facilitates the development and testing of metadata. The prototype system permits insertion of an artificial intelligent agent to facilitate a content-based search. Figure 1 shows the architecture for the web-based prototype. The client interface is the prototype's web interface that allows a researcher to query for images of interest. The querying agent is the image search engine of the prototype and contains the database subsystem.
Ingest processing is the subsystem that performs the metadata extraction task.
During ingestion, metadata is extracted from an image and stored in a database. When an image is submitted, a UNIX script is invoked. While conceptually the images are stored in a tape warehouse as in a DAAC, the schema presented in this work allows them to be stored in the database. We make this concession because the prototype is a development testbed and we wish to see immediately the results of a query action. There are two classes employed image and tile .