メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.776574352883 35.4144058210277, 136.775373400233 35.4144413937562, 136.774172380744 35.414481707246, 136.774146555424 35.4140234743909, 136.775354201082 35.4139813860308, 136.776551157595 35.4139436175023, 136.776574352883 35.4144058210277)) ^^http://www.opengis.net/ont/geosparql#wktLiteral