メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.447551023683 43.8172733262827, 142.448091086966 43.8176080455591, 142.448586734184 43.8179235531385, 142.44910241899 43.8182534925021, 142.449638037896 43.8185785771253, 142.449538551625 43.8186767074056, 142.448456955868 43.8195811645237, 142.448004626594 43.8192968880776, 142.447612696905 43.8190598646969, 142.446356999577 43.8182641827137, 142.446126576923 43.8181197370509, 142.445860967776 43.8179587888558, 142.446732457296 43.8172281733384, 142.447068731495 43.8169738414131, 142.447551023683 43.8172733262827)) ^^http://www.opengis.net/ont/geosparql#wktLiteral