メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.387015560715 42.9843472977931, 144.385391225939 42.984065901861, 144.385584525171 42.9834686621073, 144.38638727868 42.9836087998187, 144.386366766844 42.9836692423815, 144.387184644431 42.9838199923332, 144.387015560715 42.9843472977931)) ^^http://www.opengis.net/ont/geosparql#wktLiteral