メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.397426934207 34.989125802013, 138.397150529342 34.9889125364907, 138.396409882561 34.9882775971312, 138.396395909522 34.9882632190846, 138.396733799033 34.9879488420623, 138.397321344587 34.9884435050432, 138.397733179435 34.9880631274521, 138.397751261208 34.9880777908312, 138.398017433315 34.9883040751073, 138.39776856378 34.9885662747391, 138.397577459524 34.9888188725295, 138.397477153252 34.9889568933279, 138.397426934207 34.989125802013)) ^^http://www.opengis.net/ont/geosparql#wktLiteral