BufferCreate a buffer around a polygon.Create a buffer around a single polygon. Accepts the polygon as GML and provides GML output for the buffered feature.urn:ogc:wps:1.0.0:bufferInputPolygonPolygon to be bufferedURI to a set of GML that describes the polygon.text/xmlbase64http://foo.bar/gml/3.1.0/polygon.xsdtext/xmlUTF-8http://foo.bar/gml/3.1.0/polygon.xsdBufferDistanceBuffer DistanceDistance to be used to calculate buffer.floatmetersmetersfeet100