期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B2
页码：721-726
出版社：Copernicus Publications
摘要：Recent advances in Sensor Web geospatial data capture, such as high-resolution satellite imagery and Web- ready data processing and model technologies, have led to the generation of large amounts of datasets from real-time or near real-time observation and measurement. How to find and retrieve the sensor or data complying with criteria such as specific time, location, and scale has become a bottleneck in Sensor Web-based applications. We proposed to answer the above question by building a catalogue service through a harvest service based on search engine and multi protocol data retrieval service middleware based on schema mapping and matching, called Data Discovery and Retrieve Service (DDRS). DDRS hides the complexity of the geospatial world behind its standard interfaces. DDRS consists of a harvest server, a discover server, a retrieve server and a portal server. The retrieve server explores three standard interfaces-Web Feature Service (WFS), Web Coverage Service (WCS) and Catalogue Service for Web (CSW) to portal server. The DDRS is designed to be capable to discover geospatial service and data object, and retrieve data from diverse homogeneous and heterogeneous service sources: WCS server from different sources, different versions and real time observation and measurement; CSW server from different sources and versions; WFS server from different sources, different versions and real time observation and measurement. The DDRS is designed and implemented by the service middleware and Java 2 enterprise edition (J2EE) technology
关键词：Distributed GIS; Data Infrastructure; Interoperability; Sensor Web; Middleware
