メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.118246081708 43.5416805050223, 142.119956056785 43.5418278297152, 142.119874176842 43.5425668405668, 142.118050289487 43.5424174882533, 142.116826650235 43.5423240018806, 142.116933975173 43.5415575220974, 142.118246081708 43.5416805050223)) ^^http://www.opengis.net/ont/geosparql#wktLiteral