メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.260952491217 43.135038358344, 141.260394860753 43.1354425725764, 141.259808248297 43.1358570816959, 141.259250028237 43.1362614204148, 141.257668507851 43.135083519651, 141.258272403645 43.1346881543215, 141.258878274425 43.1342947721723, 141.25942955051 43.1339035209791, 141.260952491217 43.135038358344)) ^^http://www.opengis.net/ont/geosparql#wktLiteral