Modern SDIs are based on webservices, which are defined as mechanisms designed to support interoperable machine-to-machine interaction over the Web.
Webservices operate on the basis of standardized technologies and formats/protocols as defined by the W3C (see [126]). Webservices are self-contained, modular applications that can be described, published, located, and invoked over the Web. The working framework on which webservices operate is known as the publish-find-bind paradigm, whereby service providers make services available to service users, who consume resources by locating and binding to services. Interactions between service users and service providers are realized by exchanging messages. These messages are encoded using the eXtensible Markup Language (XML). XML is a general-purpose specification for encoding documents electronically. Taking advantage of the webservice framework, OGC has developed a set of technical specifications known as OGC Web Services (OWS). OWS specifications are defined using open, non-proprietary Web standards. OWS specifications are platform-neutral
Describe and apply the basic processes, processing, analysis and conversion in an SDI environment while combining multiple data sets from various remote sensing and other sources and explain challenges in data integration. Describe and use various methods of change detection. (Max. level 3)