メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.239484874147 43.1448058801736, 141.240675736107 43.1452685296692, 141.241132846516 43.1454718702285, 141.241115350222 43.1457418392477, 141.241109058518 43.1461249216984, 141.241096824027 43.1465540155682, 141.241097668935 43.1468183789683, 141.240609110255 43.1466110359719, 141.240075517801 43.1464032216563, 141.23872680607 43.1458778461112, 141.237364227831 43.1453561271139, 141.237611169595 43.1449828397885, 141.237855501228 43.1446512318929, 141.238109378828 43.1442821544519, 141.239484874147 43.1448058801736)) ^^http://www.opengis.net/ont/geosparql#wktLiteral