メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.820798867986 38.0871071631081, 140.819126186318 38.086925661074, 140.819037155762 38.0869105880606, 140.819678195637 38.0831644073013, 140.819806539458 38.0832332634562, 140.820087972131 38.0833291662518, 140.820547343212 38.0834636590192, 140.821370912957 38.0836853293657, 140.820798867986 38.0871071631081)) ^^http://www.opengis.net/ont/geosparql#wktLiteral