メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.771534735621 43.2080501409626, 141.772006668005 43.2082963595583, 141.771357863105 43.2089391938803, 141.770929925949 43.2087037737089, 141.770482504602 43.2084768506465, 141.770531866685 43.208414339513, 141.770743869026 43.2081458565681, 141.771078830386 43.2078204431381, 141.771534735621 43.2080501409626)) ^^http://www.opengis.net/ont/geosparql#wktLiteral