メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.311913333843 43.0940065042401, 141.312225678558 43.0942973424233, 141.312875677735 43.0948874495809, 141.312480818427 43.0951361302706, 141.312220861161 43.0952921676703, 141.311919282561 43.0949810232891, 141.311677617622 43.0947371817299, 141.311610798237 43.0946698222905, 141.311294664227 43.094388375945, 141.311281124166 43.0943763794399, 141.310805542871 43.0939476211055, 141.311005633019 43.0938344875482, 141.311283244001 43.0936659376135, 141.31142367965 43.0935879700179, 141.311913333843 43.0940065042401)) ^^http://www.opengis.net/ont/geosparql#wktLiteral