メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.045196258812 43.5717373668558, 142.044864914244 43.5719116501236, 142.04428838679 43.5721739720196, 142.043933498213 43.5719475390919, 142.04358097754 43.5717013114516, 142.043448292251 43.5716082496826, 142.044066423761 43.5712337680642, 142.044421916486 43.5710183550287, 142.04484953044 43.5713891491884, 142.045196258812 43.5717373668558)) ^^http://www.opengis.net/ont/geosparql#wktLiteral