メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.089610617128 34.9497817553932, 137.088337079187 34.9502048195572, 137.088177510523 34.9498517382087, 137.088420399428 34.9497782689528, 137.089157925402 34.9495551820615, 137.089412840117 34.9494431587105, 137.089444090535 34.949490927391, 137.089610617128 34.9497817553932)) ^^http://www.opengis.net/ont/geosparql#wktLiteral