メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.744702421344 35.4123784036034, 136.74449931793 35.4127616286408, 136.743245057071 35.4123075006259, 136.743447436513 35.4119322679114, 136.744702421344 35.4123784036034)) ^^http://www.opengis.net/ont/geosparql#wktLiteral