メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.865314017199 35.2576558719807, 136.864045870468 35.2576610765445, 136.864054778872 35.2562456533425, 136.865334701306 35.2562596339285, 136.865999127639 35.2562642503721, 136.865985964945 35.2572387412314, 136.866663505865 35.2572463431879, 136.866651086714 35.2576675866877, 136.865327122055 35.2576588622998, 136.865314017199 35.2576558719807)) ^^http://www.opengis.net/ont/geosparql#wktLiteral