メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.312356065401 42.3037100438244, 143.310599330206 42.3037344475325, 143.310318974196 42.3036230917356, 143.310027398938 42.3034189901866, 143.309870236625 42.303206614395, 143.309225419255 42.3019792642321, 143.311188898253 42.3014157273567, 143.311532511246 42.302089481421, 143.311809604484 42.3026328813634, 143.312045941854 42.3030963310147, 143.312337447078 42.3036678738861, 143.312356065401 42.3037100438244)) ^^http://www.opengis.net/ont/geosparql#wktLiteral