メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.37209352899 43.0894864823641, 141.372759420828 43.0895780877011, 141.372755024939 43.0895969726717, 141.372427216681 43.0910128420138, 141.371744491808 43.0909095722135, 141.370782062844 43.090778407786, 141.370900170886 43.0902977069584, 141.371005667391 43.0898598802245, 141.371113137695 43.0893646094595, 141.37209352899 43.0894864823641)) ^^http://www.opengis.net/ont/geosparql#wktLiteral