メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.425663778462 43.8035948994113, 142.425992018574 43.8038101047443, 142.426676183707 43.8042389243099, 142.425519602253 43.805215999692, 142.424483704884 43.8045673244294, 142.423452348263 43.8039649556309, 142.42460670207 43.8029493860164, 142.425467719636 43.8034780974333, 142.42558236864 43.8034008867584, 142.425752863298 43.8035084808684, 142.425663778462 43.8035948994113)) ^^http://www.opengis.net/ont/geosparql#wktLiteral