メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.371363318566 43.7365647248184, 142.371730438385 43.7366853963035, 142.372062057903 43.7367816498302, 142.371614754704 43.7375362322976, 142.371379404658 43.7379332166822, 142.37113855667 43.7383395070075, 142.369712609298 43.7379165194923, 142.369182618704 43.7377574105558, 142.369430953196 43.7373363996647, 142.369459464176 43.7372880587775, 142.369483077517 43.7372450670062, 142.369881942215 43.7369694275613, 142.370275864295 43.7366972195543, 142.370431781817 43.736611543758, 142.370596487864 43.7363126607572, 142.371363318566 43.7365647248184)) ^^http://www.opengis.net/ont/geosparql#wktLiteral