メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.885680832472 38.1801129879328, 140.885593897306 38.1813389647512, 140.885572334835 38.1816813527471, 140.884820769848 38.1816502809625, 140.883698674512 38.1816037314782, 140.882306952769 38.1815399664264, 140.882426779873 38.179753974338, 140.883278243974 38.1797795281274, 140.883814797412 38.1797956350712, 140.885193121866 38.1798482690821, 140.885697883703 38.1798725477872, 140.885680832472 38.1801129879328)) ^^http://www.opengis.net/ont/geosparql#wktLiteral