メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.042001159213 42.9103015149196, 143.043119977365 42.9103781847434, 143.042962008292 42.9115156392751, 143.04186816231 42.9114330292407, 143.040583662835 42.9113458143958, 143.040735592253 42.9102152966122, 143.040826056525 42.9102227609576, 143.041940940855 42.9102986960099, 143.042001159213 42.9103015149196)) ^^http://www.opengis.net/ont/geosparql#wktLiteral