メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.427800912927 43.7613266631671, 142.427835094686 43.7617209964098, 142.427872742507 43.7621553015903, 142.42790811882 43.7625633103414, 142.426808721024 43.7626243132414, 142.425781762409 43.7626812916638, 142.425103063342 43.762718941507, 142.425026629479 43.7619905701539, 142.424930602944 43.7610446165803, 142.425617550109 43.7609935062668, 142.426999587951 43.7608906459694, 142.427758213833 43.7608341914114, 142.427800912927 43.7613266631671)) ^^http://www.opengis.net/ont/geosparql#wktLiteral