メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.244833089081 37.1132469042968, 138.245515264115 37.1131843873062, 138.24566154131 37.1144333212559, 138.245732874773 37.1148815028708, 138.245814495489 37.1154348838997, 138.245135882918 37.1154846682208, 138.244233708304 37.1155495240977, 138.244248933534 37.1150540098272, 138.244190613846 37.1144896955071, 138.244132002121 37.114012113579, 138.244068148547 37.1133031153733, 138.244833089081 37.1132469042968)) ^^http://www.opengis.net/ont/geosparql#wktLiteral