メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.7187500 26.2333333, 127.7250000 26.2333333, 127.7250000 26.2375000, 127.7187500 26.2375000, 127.7187500 26.2333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral