メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.478729415547 43.8670198098019, 142.478329368086 43.8672963812891, 142.47791678931 43.8675567589984, 142.477494378594 43.867845994208, 142.477071911611 43.868128011733, 142.476669377838 43.8684063841406, 142.476189732886 43.8687227660206, 142.475427458477 43.8680844008273, 142.475899676545 43.8677842630211, 142.476302261871 43.8675131012606, 142.476714820004 43.8672455223174, 142.47713971535 43.8669580861433, 142.477547271001 43.8666869099735, 142.477964747068 43.8664121175036, 142.478729415547 43.8670198098019)) ^^http://www.opengis.net/ont/geosparql#wktLiteral