メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.742055702157 42.9120221080695, 140.739602264846 42.9121441909218, 140.73959707058 42.9121139494449, 140.739627706113 42.9120584400883, 140.740270995396 42.9111328493865, 140.740804529953 42.9104501487627, 140.741160545726 42.9099565512785, 140.741305052312 42.9097357194311, 140.741410448802 42.9094981961312, 140.741445445707 42.9095030184107, 140.741873384625 42.909496634085, 140.742055702157 42.9120221080695)) ^^http://www.opengis.net/ont/geosparql#wktLiteral