メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.748553990781 35.3989435359384, 136.747877179463 35.3989283853049, 136.747913935645 35.3972259996104, 136.748228965314 35.3972250429726, 136.748225160875 35.3973287608177, 136.748557472114 35.3973204696529, 136.748553990781 35.3989435359384)) ^^http://www.opengis.net/ont/geosparql#wktLiteral