メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399229908817 43.7548689470973, 142.399276175903 43.7553427680345, 142.397247586724 43.7554532099885, 142.395229951071 43.7555829605939, 142.395229109511 43.7555708307594, 142.395183295795 43.7550960940246, 142.395148312786 43.7546026022415, 142.397152394585 43.7545072051182, 142.399197120911 43.7543932994537, 142.399229908817 43.7548689470973)) ^^http://www.opengis.net/ont/geosparql#wktLiteral