メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.893621131773 35.2634153015354, 136.893233124083 35.2633304953745, 136.891664268275 35.2629996675834, 136.891661359376 35.2612606638903, 136.893879686054 35.2612601641654, 136.893854536164 35.2614767151635, 136.893686335195 35.2629247727503, 136.893664648618 35.2630737991739, 136.893657354446 35.2631432862649, 136.893621131773 35.2634153015354)) ^^http://www.opengis.net/ont/geosparql#wktLiteral