メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.40623038057 43.7825079618733, 142.406000511539 43.7827134553372, 142.405267679687 43.7833335249132, 142.40496108627 43.7835739119181, 142.404434532582 43.7832216165585, 142.4039200959 43.7829127615801, 142.403415248616 43.7825934491751, 142.40324215016 43.7824823936487, 142.404752814297 43.7819343446237, 142.404805550295 43.7819099246577, 142.405275409128 43.7817569936248, 142.406364494125 43.7823929963487, 142.40623038057 43.7825079618733)) ^^http://www.opengis.net/ont/geosparql#wktLiteral