メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.352879456231 43.1186702293651, 141.352971240635 43.1186826187137, 141.353286631833 43.1187261454343, 141.353682078252 43.1187702236037, 141.354205730747 43.1188373104559, 141.354111947616 43.1192110612239, 141.353990864308 43.1197003698469, 141.353469836951 43.1196038318356, 141.35307850061 43.1195538745487, 141.352671100983 43.1195125810924, 141.352195861336 43.1194561290356, 141.352400237682 43.1186107966839, 141.352879456231 43.1186702293651)) ^^http://www.opengis.net/ont/geosparql#wktLiteral