メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.743554858425 43.2006744906814, 141.743750984928 43.2007655881324, 141.74399329425 43.2008926854515, 141.743284189693 43.2016392506732, 141.742659851738 43.2022938458746, 141.742204304251 43.2020574969813, 141.741764746087 43.2018294449497, 141.742387808492 43.201161134407, 141.743099271162 43.2004266108645, 141.743306945213 43.2005335136063, 141.743563679607 43.2006655978651, 141.743554858425 43.2006744906814)) ^^http://www.opengis.net/ont/geosparql#wktLiteral