メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.366572125335 43.0949483522204, 141.366492112909 43.0952666634788, 141.366381759876 43.0957058439595, 141.365815750772 43.0956321302559, 141.365367102967 43.0955854836121, 141.364846402586 43.0955178114475, 141.364998675246 43.0949072124314, 141.365008965886 43.0948659477153, 141.365133331508 43.0943673104238, 141.365664621289 43.0944387897975, 141.366660046478 43.0945672291877, 141.366572125335 43.0949483522204)) ^^http://www.opengis.net/ont/geosparql#wktLiteral