メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.74612050051 43.157260373735, 141.746156470619 43.1575127390424, 141.746182048753 43.1577265158982, 141.745334306749 43.1577807252205, 141.745314897281 43.1576469412951, 141.745310608891 43.1576076766712, 141.745279260728 43.1573192536955, 141.74521325515 43.1567126394075, 141.746033298585 43.1566487441001, 141.74612050051 43.157260373735)) ^^http://www.opengis.net/ont/geosparql#wktLiteral