メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.900695314418 43.4802975510526, 141.90083978878 43.4808431829692, 141.90007116252 43.4809571994795, 141.899922458504 43.4804423552471, 141.899906835715 43.4804217723735, 141.899695696539 43.4797870454198, 141.899298447478 43.4794915599606, 141.899594028129 43.4794509343525, 141.899497527689 43.4791148389208, 141.899684150499 43.4790863642096, 141.900209752459 43.4790060711124, 141.90038605347 43.4795703312937, 141.900552885624 43.4798406050302, 141.900695314418 43.4802975510526)) ^^http://www.opengis.net/ont/geosparql#wktLiteral