メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.922520630542 43.4952136843712, 141.921425548823 43.4953628682422, 141.920869197104 43.495408174235, 141.92022180187 43.4955192517049, 141.920075716985 43.4951713102131, 141.919748269352 43.4946776900344, 141.920614494981 43.4945459030083, 141.921783726636 43.4943606150836, 141.922214483239 43.4942947241164, 141.922249916928 43.4942892346495, 141.922520630542 43.4952136843712)) ^^http://www.opengis.net/ont/geosparql#wktLiteral