メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.094302815831 43.5332236067932, 142.093036536466 43.5335165307978, 142.092337009552 43.5336193799944, 142.091376549302 43.5337099707138, 142.09162827426 43.5320077918241, 142.094108318017 43.5321100520274, 142.094180265375 43.5329002201111, 142.094302815831 43.5332236067932)) ^^http://www.opengis.net/ont/geosparql#wktLiteral