メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.906784862221 43.48371876445, 141.905782194336 43.4838717826108, 141.905740326112 43.4837494682681, 141.905393617292 43.4826343098132, 141.905398763849 43.4826124541345, 141.906412678019 43.4824614426673, 141.906581077513 43.4830507037495, 141.906784862221 43.48371876445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral