メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.644886057987 42.6576333712144, 141.644278611216 42.6586137216091, 141.64040470945 42.6573245871432, 141.640042339628 42.6572056184256, 141.638223975837 42.6565776644077, 141.638805051802 42.6556560033868, 141.638814644621 42.6556397368707, 141.639283975767 42.6548446418225, 141.639769065567 42.6540689016656, 141.643279889871 42.6552558412322, 141.645820524088 42.6561078207279, 141.644886057987 42.6576333712144)) ^^http://www.opengis.net/ont/geosparql#wktLiteral