メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.960749614752 37.2280080915095, 138.960307457027 37.2279170305199, 138.958099504601 37.2279271686118, 138.95837081555 37.2266765128973, 138.958593709365 37.2258043752165, 138.959485989766 37.2260118238514, 138.960642378955 37.2262325950473, 138.960663561425 37.2264363914427, 138.960683465992 37.2267908497822, 138.960749614752 37.2280080915095)) ^^http://www.opengis.net/ont/geosparql#wktLiteral