メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.053632176256 42.9221754957923, 143.053522565651 42.9231080240308, 143.053016411766 42.9228206059817, 143.05296550394 42.9228135075977, 143.053049861784 42.922139205773, 143.053178521748 42.9211109629959, 143.053755097623 42.9211482763868, 143.053711050242 42.9215216980014, 143.053632176256 42.9221754957923)) ^^http://www.opengis.net/ont/geosparql#wktLiteral