メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.334586302031 43.7638806342368, 142.333810761279 43.7636435645581, 142.33302681039 43.7633955185471, 142.333067077617 43.7633345552591, 142.33330028903 43.7629529276984, 142.333696148258 43.7622360291691, 142.334500242141 43.7624718480311, 142.335260610626 43.7626930854662, 142.335079442803 43.762997906905, 142.334841224568 43.7634026979336, 142.334586302031 43.7638806342368)) ^^http://www.opengis.net/ont/geosparql#wktLiteral