メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.280356948716 38.3612635639327, 140.280297072034 38.3621024191248, 140.279163603998 38.3620701992175, 140.278971454349 38.3620635227813, 140.278292743325 38.3620545520578, 140.278109890733 38.3620492514503, 140.278136041242 38.3612007686557, 140.278215811444 38.3611998502745, 140.278254866375 38.3603209094601, 140.278503043073 38.3603181378576, 140.280409847936 38.3603884869076, 140.280356948716 38.3612635639327)) ^^http://www.opengis.net/ont/geosparql#wktLiteral