メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.379441813605 42.9997428467651, 144.380279740699 42.9998967265269, 144.380091709247 43.000466093417, 144.37990773188 43.0010086607966, 144.379085917947 43.0008667151102, 144.378372459754 43.0007382891523, 144.378738433172 42.9996283725796, 144.379441813605 42.9997428467651)) ^^http://www.opengis.net/ont/geosparql#wktLiteral