メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.364557639541 45.1254772542331, 142.363024544224 45.1252756267223, 142.36323018897 45.1244271918333, 142.364782395016 45.1246181819233, 142.364557639541 45.1254772542331)) ^^http://www.opengis.net/ont/geosparql#wktLiteral