メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.431925995213 43.8075261608603, 142.43246503486 43.8078651967843, 142.432960839891 43.8081740268442, 142.433472733537 43.8084902816079, 142.432893750216 43.8089928678324, 142.432330272527 43.8094753304333, 142.431808294256 43.8091559048364, 142.431306918075 43.808836144363, 142.430788392682 43.8085106424562, 142.430222870234 43.8081591224525, 142.431380055924 43.8071755299092, 142.431925995213 43.8075261608603)) ^^http://www.opengis.net/ont/geosparql#wktLiteral