メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.363750346052 43.1162360007963, 141.364348041296 43.1163098268957, 141.364217898382 43.1168517981022, 141.364208721029 43.1168557354732, 141.364068980526 43.1174238633683, 141.363462386977 43.1173536931108, 141.362274990132 43.1172030639456, 141.362406520183 43.1165999253452, 141.362548408454 43.1160702156864, 141.363149405353 43.1161544106623, 141.363750346052 43.1162360007963)) ^^http://www.opengis.net/ont/geosparql#wktLiteral