メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.171422320916 34.6656546722492, 135.171503529005 34.6661341540165, 135.170187064875 34.6662378783876, 135.170135753595 34.6657469215815, 135.170082123465 34.6652965475708, 135.17135261419 34.6652337077655, 135.171422320916 34.6656546722492)) ^^http://www.opengis.net/ont/geosparql#wktLiteral