メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.416421034477 43.7884798195857, 142.416937533312 43.7887986180083, 142.417446422524 43.789115157589, 142.417270097668 43.789250009544, 142.41615609612 43.7901831861585, 142.415693297205 43.7898918214826, 142.4155022225 43.789773356604, 142.41516183551 43.7895514495258, 142.414811053995 43.7893349722166, 142.414458789473 43.7891303441753, 142.414085624698 43.7888998499581, 142.415207069986 43.7879612475945, 142.415386520623 43.7878152139048, 142.415741805831 43.7880435683796, 142.416085148491 43.7882611445891, 142.416421034477 43.7884798195857)) ^^http://www.opengis.net/ont/geosparql#wktLiteral