メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.108535460419 43.8269499784566, 144.108249279272 43.8270365231782, 144.107949282184 43.8271286025782, 144.107870009751 43.8271531691243, 144.10784665374 43.8271142404377, 144.107060164855 43.8257266390609, 144.108068039341 43.8254095169357, 144.108904533705 43.8267928692058, 144.108926661888 43.8268297960939, 144.108535460419 43.8269499784566)) ^^http://www.opengis.net/ont/geosparql#wktLiteral