メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.130827357335 42.6951132316352, 143.129609344951 42.6955782066444, 143.129544547131 42.6954864254992, 143.129146307645 42.6949351063007, 143.128208784419 42.6947222863802, 143.127956408746 42.6943714236773, 143.129845150201 42.6937216852296, 143.130759949505 42.6950190800874, 143.130827357335 42.6951132316352)) ^^http://www.opengis.net/ont/geosparql#wktLiteral