メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.924511755643 37.7689078099944, 140.924326208621 37.7689293771458, 140.924086049244 37.7689396218487, 140.923909802175 37.7689242158854, 140.923848057077 37.7689043727014, 140.923697646853 37.7687944003304, 140.923487169985 37.7685857285499, 140.923911889517 37.7681122811417, 140.924543790064 37.7681610652904, 140.924511755643 37.7689078099944)) ^^http://www.opengis.net/ont/geosparql#wktLiteral