メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.556958140521 42.9792459990093, 141.556909813495 42.97967304308, 141.556868898562 42.9801438084158, 141.557391057979 42.9801721460627, 141.55733072798 42.980623383002, 141.557304170868 42.9808731818887, 141.557192830758 42.9817984989189, 141.556945876594 42.9817519924182, 141.555873138304 42.9813704860084, 141.554859472302 42.9810183756501, 141.554977129509 42.9802369286703, 141.555183050494 42.9788296409533, 141.555432116288 42.9788406463858, 141.555587999181 42.9788584711578, 141.557010078723 42.9789580922127, 141.556958140521 42.9792459990093)) ^^http://www.opengis.net/ont/geosparql#wktLiteral