メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.090987553778 39.7735467684289, 140.091506664636 39.7727631462888, 140.092137286147 39.7729960199195, 140.092140692874 39.7729972738969, 140.09088542625 39.7748779498486, 140.090260453955 39.7746443484925, 140.090987553778 39.7735467684289)) ^^http://www.opengis.net/ont/geosparql#wktLiteral