メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.423614006442 43.7540347995091, 142.424225879618 43.7539976601266, 142.424334849349 43.7549571797282, 142.42372917131 43.7549807206469, 142.422698960365 43.7550456463269, 142.420853850649 43.7551276129337, 142.420828826639 43.7546842883968, 142.420827536878 43.7546614002858, 142.420773121745 43.754192961784, 142.422627487333 43.7540815519329, 142.423614006442 43.7540347995091)) ^^http://www.opengis.net/ont/geosparql#wktLiteral