メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348015022617 44.4823552408556, 142.346927131248 44.4820815669993, 142.347270227495 44.4813488973886, 142.348387277724 44.4816151948117, 142.348015022617 44.4823552408556)) ^^http://www.opengis.net/ont/geosparql#wktLiteral