メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.123487057502 42.9838789618533, 144.121836799001 42.9830838234056, 144.122054728706 42.9813065611703, 144.122091547321 42.98113730959, 144.124692784582 42.9824701458477, 144.12400999632 42.9833024211263, 144.123487057502 42.9838789618533)) ^^http://www.opengis.net/ont/geosparql#wktLiteral