メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.337757090845 43.0863149261494, 141.337566659802 43.0870493966407, 141.337360129144 43.0877303585524, 141.336762121814 43.0876405546075, 141.336089380649 43.087543398414, 141.335964406534 43.0876492988036, 141.335515537656 43.0874098257611, 141.335715878753 43.0872236513306, 141.336692459103 43.0863294916323, 141.336951577529 43.0860875909995, 141.337392108773 43.0863325480019, 141.337460314666 43.086275563865, 141.337757090845 43.0863149261494)) ^^http://www.opengis.net/ont/geosparql#wktLiteral