メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.396184959667 43.7885812243722, 142.396480467115 43.7887676964553, 142.397389702021 43.7893345517116, 142.397794343352 43.7895583269958, 142.39777294757 43.7895764622179, 142.396596299145 43.7905732003423, 142.396058997337 43.7902300932058, 142.395517615647 43.7898989414959, 142.395306850095 43.7897676683558, 142.395013394614 43.7895767067373, 142.395262118235 43.7893653751634, 142.394766595132 43.7890553466499, 142.395709698816 43.7882858724557, 142.396184959667 43.7885812243722)) ^^http://www.opengis.net/ont/geosparql#wktLiteral