メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.402607670519 43.7478068547002, 142.402649244394 43.748288520418, 142.40067113179 43.7483997436413, 142.398590830598 43.7485291914908, 142.398531323361 43.7480349427832, 142.398477629286 43.7475322128446, 142.40058127088 43.7474154312322, 142.402547190399 43.7472998468422, 142.402607670519 43.7478068547002)) ^^http://www.opengis.net/ont/geosparql#wktLiteral