メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.345066140618 43.1006799812651, 141.344990970943 43.1010071172999, 141.34496310388 43.1011983305747, 141.344952400569 43.1012604166549, 141.344946628183 43.1012939170719, 141.34348253655 43.1010832119981, 141.343439963235 43.1010739433366, 141.343602513442 43.1004582406444, 141.343721406146 43.1000237797839, 141.345188403746 43.1002244472894, 141.345124832017 43.1004485027896, 141.345066140618 43.1006799812651)) ^^http://www.opengis.net/ont/geosparql#wktLiteral