メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.324735027169 43.7646187906491, 142.325157151456 43.7647462874448, 142.324507480416 43.7658534336474, 142.324055044163 43.7657154931701, 142.323455530408 43.765535911821, 142.323752905949 43.7650214228765, 142.324104795813 43.7644210529518, 142.324735027169 43.7646187906491)) ^^http://www.opengis.net/ont/geosparql#wktLiteral