メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.521562258543 44.0584768479309, 143.522145874783 44.0594837235549, 143.521544706127 44.0596841092416, 143.520942321889 44.0599006683988, 143.520813118881 44.0599326361096, 143.520624090422 44.0596613695474, 143.520326083345 44.0597613836367, 143.519844987085 44.0589965445134, 143.519266904571 44.0581505578353, 143.52102656389 44.0576213534788, 143.521562258543 44.0584768479309)) ^^http://www.opengis.net/ont/geosparql#wktLiteral