メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.260790137765 44.2391094856501, 143.25881401777 44.2398479426827, 143.257154196968 44.2404681696448, 143.251424226052 44.2428086716584, 143.250440249646 44.2420262503266, 143.249425848791 44.240710437891, 143.252862556738 44.2393806107142, 143.256422454698 44.2379708231518, 143.256884691836 44.2377988511673, 143.259221787564 44.236929352259, 143.260790137765 44.2391094856501)) ^^http://www.opengis.net/ont/geosparql#wktLiteral