メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.391220314091 42.9835054187966, 144.390702606578 42.9839169593572, 144.390495467047 42.9837775846827, 144.390220401505 42.9839993399361, 144.389024956089 42.9831591695521, 144.389343162884 42.982159927177, 144.38951264585 42.9822687846529, 144.389840444816 42.9825124472032, 144.390536562233 42.9830133565138, 144.391220314091 42.9835054187966)) ^^http://www.opengis.net/ont/geosparql#wktLiteral