メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.350947936417 43.7834942604852, 142.350732835452 43.7836544016462, 142.350602763255 43.783743158548, 142.350341565998 43.78393074784, 142.349922601822 43.7842353160143, 142.349557128929 43.7839651098481, 142.349117489346 43.783649979893, 142.348266844094 43.783032524026, 142.348693301227 43.7827257922894, 142.349069767673 43.7824562858354, 142.349477829394 43.7821598343966, 142.349525385764 43.7821289387556, 142.351175048944 43.7833274813075, 142.350947936417 43.7834942604852)) ^^http://www.opengis.net/ont/geosparql#wktLiteral