メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.267184734181 44.0261323088283, 144.266766965854 44.02653197949, 144.265213128087 44.0259908239776, 144.265262457076 44.0258993433732, 144.265516713283 44.0255286613099, 144.267184734181 44.0261323088283)) ^^http://www.opengis.net/ont/geosparql#wktLiteral