メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364151017135 43.0709335714803, 141.364366869814 43.0709595754714, 141.364208224628 43.0716371682065, 141.364098629939 43.0721726538022, 141.363752827414 43.0721304513348, 141.363392646539 43.0720808230833, 141.36261599086 43.0719737422942, 141.362487415216 43.0719556548904, 141.362623622556 43.0713917535405, 141.3630203047 43.0714377286735, 141.363179299583 43.0708166143593, 141.364151017135 43.0709335714803)) ^^http://www.opengis.net/ont/geosparql#wktLiteral