メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.284371652226 43.0789821646378, 141.284768187929 43.079366832249, 141.285202978987 43.079777984602, 141.286167458744 43.0806804125494, 141.286065880922 43.0807398293321, 141.28529708912 43.0811850781786, 141.284339209584 43.0802903639327, 141.28389313372 43.0798770039033, 141.283501000833 43.0795113592747, 141.283490220847 43.0795013524484, 141.283032393891 43.0790732621175, 141.283192940693 43.0789673653432, 141.283895465108 43.078525719289, 141.284371652226 43.0789821646378)) ^^http://www.opengis.net/ont/geosparql#wktLiteral