メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.550184504269 43.246195849491, 143.548970286399 43.2462453996158, 143.548896928325 43.2451894629122, 143.550096381027 43.245129672215, 143.550184504269 43.246195849491)) ^^http://www.opengis.net/ont/geosparql#wktLiteral