メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.685270104337 43.7257791733428, 143.699032800151 43.7267045263185, 143.698525941956 43.7302852255616, 143.701096296227 43.730387871211, 143.712572843456 43.7312461957646, 143.710981592776 43.7429354687954, 143.690088445085 43.741338637274, 143.683531907723 43.7409280761966, 143.662754802306 43.7398676588518, 143.663221760382 43.7362787172709, 143.663971378268 43.7300604170463, 143.664640078685 43.7245326670079, 143.671775578765 43.7249080144427, 143.685270104337 43.7257791733428)) ^^http://www.opengis.net/ont/geosparql#wktLiteral