メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.816945956772 35.3122275728956, 136.817026878751 35.3120976627852, 136.817645336827 35.3124024817055, 136.817443646422 35.3126531031672, 136.816788429587 35.3124309255265, 136.816687158177 35.3126536662138, 136.814880417638 35.3121038414544, 136.815059522234 35.3118379468394, 136.815350494264 35.3114338532997, 136.816945956772 35.3122275728956)) ^^http://www.opengis.net/ont/geosparql#wktLiteral