メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.634167154229 35.3611871657079, 136.634071278113 35.3611779397955, 136.632900973401 35.3611107312344, 136.632920238685 35.3608741262756, 136.63418778059 35.3609454951031, 136.634167154229 35.3611871657079)) ^^http://www.opengis.net/ont/geosparql#wktLiteral