メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390870352399 44.1807103724224, 142.391722117364 44.1808517163716, 142.391745319146 44.1808553977531, 142.391312010258 44.1821775959803, 142.390448790835 44.1820448262784, 142.390424238466 44.1821199707942, 142.388932365352 44.181874130634, 142.388952267457 44.1818045291441, 142.389329581405 44.1805194261719, 142.389701172361 44.1805652267731, 142.390845108556 44.180706255941, 142.390870352399 44.1807103724224)) ^^http://www.opengis.net/ont/geosparql#wktLiteral