メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.370650363403 34.9693304392497, 138.371093676 34.9693976035962, 138.37116434794 34.9693676052972, 138.37164327283 34.9700196318913, 138.370947175692 34.9703460993819, 138.370907626292 34.9703400718415, 138.370447712201 34.9702709885559, 138.369102338171 34.9700688364951, 138.36934599787 34.9693390500154, 138.369411467139 34.9691448114448, 138.370145443775 34.9692548276656, 138.370650363403 34.9693304392497)) ^^http://www.opengis.net/ont/geosparql#wktLiteral