メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.905393617292 43.4826343098132, 141.904538687591 43.4827521755097, 141.904357975315 43.482191356009, 141.904159727459 43.4815229200427, 141.904994690503 43.4813895966435, 141.905004961529 43.4814047482959, 141.905398763849 43.4826124541345, 141.905393617292 43.4826343098132)) ^^http://www.opengis.net/ont/geosparql#wktLiteral