メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.982605674425 43.5502050736513, 144.982140186722 43.550596912192, 144.981336174662 43.5500151624877, 144.981831785764 43.5496181055056, 144.982605674425 43.5502050736513)) ^^http://www.opengis.net/ont/geosparql#wktLiteral