メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.772372310877 43.2042936053023, 141.772834318307 43.2045205084235, 141.772219751481 43.2051935927591, 141.771916515109 43.205046890775, 141.771722018637 43.2049489562517, 141.771368645101 43.2047596353694, 141.771280306234 43.2047148903886, 141.771890884131 43.2040486857125, 141.772372310877 43.2042936053023)) ^^http://www.opengis.net/ont/geosparql#wktLiteral