メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.447733560885 43.8156653126399, 142.447921132236 43.8157895239697, 142.44823732183 43.8159914437486, 142.447068731495 43.8169738414131, 142.446759759682 43.8167671939765, 142.446573045462 43.8166422583176, 142.446458009483 43.8167291795657, 142.444851245859 43.81575066233, 142.445561361003 43.8151596388679, 142.446147066856 43.8146625957943, 142.44695710991 43.8151796704977, 142.447329503323 43.8154125960774, 142.447733560885 43.8156653126399)) ^^http://www.opengis.net/ont/geosparql#wktLiteral