メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.429369677287 43.0827766901391, 141.428865179889 43.0835748941187, 141.428281943924 43.0845561599963, 141.428260972995 43.0845458820314, 141.425817367516 43.0833762498525, 141.426177812544 43.0829774773011, 141.426612334104 43.0824989905909, 141.427257327573 43.0817572257127, 141.428095921582 43.0808286467298, 141.428595661453 43.0802563081585, 141.429554044189 43.080471425879, 141.429558850815 43.0804635132454, 141.430603085747 43.0808027361648, 141.429369677287 43.0827766901391)) ^^http://www.opengis.net/ont/geosparql#wktLiteral