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The OGC Web Processing Service (WPS) Interface Standard provides rules for standardizing how inputs and outputs (requests and responses) for invoking geospatial processing services, such as polygon overlay, as a Web service. The WPS standard defines how a client can request the execution of a process, and how the output from the process is handled. It defines an interface that facilitates the publishing of geospatial processes and clients’ discovery of and binding to those processes. The data required by the WPS can be delivered across a network or they can be available at the server. WPS can describe any calculation (i.e. process) including all of its inputs and outputs, and trigger its execution as a Web service. WPS supports simultaneous exposure of processes via HTTP GET, HTTP POST, and SOAP, thus allowing the client to choose the most appropriate interface mechanism. The specific processes served up by a WPS implementation are defined by the owner of that implementation. Although WPS was designed to work with spatially referenced data, it can be used with any kind of data. WPS makes it possible to publish, find, and bind to processes in a standardized and thus interoperable fashion. Theoretically, it is transport/platform neutral (like SOAP), but in practice it has only been specified for HTTP. ==Operations== WPS defines three operations: # ''GetCapabilities'' returns service-level metadata # ''DescribeProcess'' returns a description of a process including its inputs and outputs # ''Execute'' returns the output(s) of a process WPS operations are invoked by submitting XML or URL-encoded requests to an ''Online Resource URL''. When requesting an ''Execute'' operation the HTTP request identifies the inputs, the name of process to be executed, and the form of output to be provided. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Web Processing Service」の詳細全文を読む スポンサード リンク
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