メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.081452109486 43.5356287902467, 142.080577253461 43.5355392118752, 142.080814258855 43.5343049458557, 142.080910209666 43.5337566613383, 142.081332134517 43.5336942862344, 142.081289534504 43.5341218681687, 142.081272931529 43.5343809559205, 142.08147183985 43.5343891669117, 142.081728637039 43.534392189617, 142.081660765811 43.5347426224377, 142.081532943523 43.5353089681944, 142.081452109486 43.5356287902467)) ^^http://www.opengis.net/ont/geosparql#wktLiteral