メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.875281318071 35.3847803839095, 136.874351571574 35.3848608176212, 136.874271476667 35.3843952105193, 136.874274474794 35.3838567768758, 136.875188858659 35.3839085563997, 136.875213850024 35.3843409337984, 136.875281318071 35.3847803839095)) ^^http://www.opengis.net/ont/geosparql#wktLiteral