|Web Feature Service (WFS)|
The Web Feature Service (WFS) allows an application to retrieve, query, and filter geospatial Content encoded in Geography Markup Language (GML) from multiple Web Features. Information can be retrieved about a specific feature, or a set of features for analysis. Filters can be applied in the request. For example, select all the water features within a region or custom polygon, such as a new housing development. An application would overlay these retrieved features, such as streets, store locations and points of interest, onto a map image by adding points and vectors to the image.
Use the Web Feature Service to help perform a search for features within a given distance from a point (or other type of geometry). A standard compliant WFS client, such as MapInfo Pro, can access data by submitting an XML request through HTTP to display it on a map or to get vector geometries for calculations. For example, a real estate application determines a realistic value for a home by comparing the distance of it to numerous features, including railroad tracks, highways, shopping malls, and police stations. This application would call WFS to select a highway feature and a home (a point). The application would then calculate distance values for proprietary rating calculations.
The OpenGIS Consortium (OGC) Web Feature Service standard (versions 1.0.0 and 1.1.0 located at http://www.opengeospatial.org/standards/wfs) defines how a client can retrieve and query features over the Internet or a private intranet by submitting requests through HTTP. Both SOAP and HTTP POST/GET requests are supported. Products that can use results from an OGC compliant WFS server will work with the Spectrum™ Technology Platform OGC Web Feature Service.
The WFS service and resources you expose to WFS are configured and managed using the Spatial Manager utility; see Managing WFS Feature Types and Configuration.