メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.971503009906 36.8972954716527, 139.969634606718 36.8988118632044, 139.96843565117 36.8978401575827, 139.967933114979 36.897437658571, 139.969752787783 36.8959303586694, 139.970548902427 36.8953141192153, 139.971610540786 36.8944320059387, 139.972804668044 36.8953836162986, 139.973342633166 36.8958016150174, 139.971503009906 36.8972954716527)) ^^http://www.opengis.net/ont/geosparql#wktLiteral