メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.284385241952 43.1071470152317, 141.282946041336 43.1080387321486, 141.281752474424 43.1070194992559, 141.283230364017 43.1061391659413, 141.28486610527 43.1051240566141, 141.286002672795 43.1061493172791, 141.284385241952 43.1071470152317)) ^^http://www.opengis.net/ont/geosparql#wktLiteral