メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.745310608891 43.1576076766712, 141.744949890811 43.157618532156, 141.74495821265 43.1576696977183, 141.744966031791 43.1577176985361, 141.744284424843 43.1577614519935, 141.744278914609 43.1577131093504, 141.744244605688 43.1574116608916, 141.744189788725 43.1570340238977, 141.744396369838 43.1570171456364, 141.744835286713 43.1571513099805, 141.744778433434 43.1567465159783, 141.74521325515 43.1567126394075, 141.745279260728 43.1573192536955, 141.745310608891 43.1576076766712)) ^^http://www.opengis.net/ont/geosparql#wktLiteral