メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.971152046975 43.5452637471124, 144.97069875626 43.5450042392015, 144.971341159827 43.5445087327202, 144.971751434507 43.5447747823664, 144.971152046975 43.5452637471124)) ^^http://www.opengis.net/ont/geosparql#wktLiteral