メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.771483222654 43.2059333993288, 141.771092572878 43.2057336529628, 141.770650645577 43.205520044792, 141.771368645101 43.2047596353694, 141.771722018637 43.2049489562517, 141.771916515109 43.205046890775, 141.772219751481 43.2051935927591, 141.771880900518 43.2055336944471, 141.771483222654 43.2059333993288)) ^^http://www.opengis.net/ont/geosparql#wktLiteral