メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348681142974 44.4784425688545, 142.348149949458 44.4783236381973, 142.348249109132 44.4781154266698, 142.348273024587 44.4780652037837, 142.34834043917 44.4779236756723, 142.348807428133 44.4769586796058, 142.349328937232 44.4770845433809, 142.348681142974 44.4784425688545)) ^^http://www.opengis.net/ont/geosparql#wktLiteral