メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.991648283433 34.8751381010778, 136.991208885689 34.8752636025427, 136.989655748808 34.8756850388643, 136.989209252189 34.874506165591, 136.989412513219 34.874564709317, 136.98962186004 34.8746805212797, 136.99054480312 34.8742571808324, 136.991059937001 34.8740279085575, 136.991437336677 34.8747199354181, 136.991648283433 34.8751381010778)) ^^http://www.opengis.net/ont/geosparql#wktLiteral