メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390257087506 43.7614854828876, 142.390994153419 43.7614521843379, 142.391820021861 43.7613955479409, 142.391920225817 43.7623258717834, 142.391963384331 43.762762412469, 142.392011744344 43.7632844761928, 142.391321806671 43.7633252826319, 142.390963886118 43.763346078148, 142.39041296534 43.7633823500163, 142.389697104801 43.7634162877201, 142.388739403498 43.763471783343, 142.388674444618 43.7629242641447, 142.388651644132 43.7627259661929, 142.388492633725 43.7615928314953, 142.389536771572 43.7615187213293, 142.390257087506 43.7614854828876)) ^^http://www.opengis.net/ont/geosparql#wktLiteral