メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.715378087303 35.3652195150845, 136.713303137554 35.3652976955204, 136.713152935503 35.3629363417891, 136.714644451457 35.3627351347935, 136.714902312564 35.3627083588127, 136.715210923127 35.3627067719397, 136.715378087303 35.3652195150845)) ^^http://www.opengis.net/ont/geosparql#wktLiteral