メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.344881708089 44.4867454986963, 142.344068537373 44.4865422969146, 142.343997217703 44.486695918752, 142.343647316398 44.4865936535661, 142.343717711258 44.4864602124923, 142.34352725534 44.4864087241411, 142.343618753337 44.4862198961204, 142.343756892652 44.4859348055181, 142.344880139176 44.4862367193256, 142.345089484681 44.4862930065594, 142.344881708089 44.4867454986963)) ^^http://www.opengis.net/ont/geosparql#wktLiteral