メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.049086117686 42.9107930748701, 143.048335685354 42.9107477372656, 143.047536922907 42.9106828974771, 143.047598052814 42.91019288334, 143.047660307095 42.9096936480241, 143.049226034697 42.9097967454544, 143.049086117686 42.9107930748701)) ^^http://www.opengis.net/ont/geosparql#wktLiteral