メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.764847407788 43.2011489669069, 141.764648449698 43.201356645725, 141.764323583422 43.2017002990563, 141.763863821065 43.2014697103105, 141.763787833344 43.2015477319676, 141.763299538241 43.2013030954054, 141.763718420453 43.2008813613041, 141.763904049897 43.2006816437364, 141.764847407788 43.2011489669069)) ^^http://www.opengis.net/ont/geosparql#wktLiteral