メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.319798662269 43.0548415566536, 141.320632635736 43.0549695809611, 141.320626652243 43.054997453357, 141.320524839354 43.0553564998572, 141.320487140355 43.0555156302609, 141.320469101122 43.0556050125534, 141.320414542894 43.0558770240372, 141.319619550062 43.0557707661763, 141.318876373439 43.0556693544138, 141.318961214206 43.0553297221998, 141.318967539888 43.0553045956302, 141.319118322107 43.0547396031766, 141.319457031544 43.0547920102308, 141.319645044914 43.0548211080368, 141.319798662269 43.0548415566536)) ^^http://www.opengis.net/ont/geosparql#wktLiteral