メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.355753810377 43.8416069874298, 142.354884442268 43.8409643465741, 142.354547010539 43.8407442426771, 142.354042957991 43.8404314968175, 142.353170052577 43.8397949107953, 142.355614953312 43.8380962217425, 142.355975076973 43.8383606558945, 142.355583991415 43.8386402042678, 142.357755015676 43.8402013489166, 142.356731755327 43.8409232597939, 142.356510483596 43.8410793642749, 142.355753810377 43.8416069874298)) ^^http://www.opengis.net/ont/geosparql#wktLiteral