メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.206850323279 38.4211475683944, 141.209270837689 38.4219536073682, 141.21048293709 38.4223608890196, 141.209960819316 38.4235208321963, 141.208721811126 38.4231548755725, 141.207490141221 38.4228116824092, 141.207479255821 38.4228087612732, 141.206882818392 38.4226373788292, 141.206204758776 38.4224424635023, 141.205523521875 38.4222467092045, 141.204852188396 38.4220537357229, 141.205438175914 38.421262150378, 141.205800344248 38.4207744950999, 141.206850323279 38.4211475683944)) ^^http://www.opengis.net/ont/geosparql#wktLiteral