メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.772000875203 35.4341304123967, 136.771497899642 35.4341958945358, 136.771154172198 35.4342115753445, 136.771082174228 35.4332045530569, 136.771400986586 35.4331454130314, 136.771860807659 35.4330532423374, 136.772000875203 35.4341304123967)) ^^http://www.opengis.net/ont/geosparql#wktLiteral