メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.39511003527 44.1622715926112, 142.394124486279 44.1621231436782, 142.393788114314 44.1620631097482, 142.394160311849 44.1607874769096, 142.395492524214 44.1610065251741, 142.39511003527 44.1622715926112)) ^^http://www.opengis.net/ont/geosparql#wktLiteral