メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.333819389421 43.0657011898698, 141.334609198666 43.0658115342885, 141.334475658358 43.0663473585785, 141.334333661586 43.0669356505302, 141.333509432072 43.0668296000315, 141.332759832112 43.0667299783446, 141.332904593752 43.0661438912785, 141.333050944023 43.06559902846, 141.333819389421 43.0657011898698)) ^^http://www.opengis.net/ont/geosparql#wktLiteral