メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.324840500897 43.0662229417364, 141.324694260695 43.0667808726937, 141.324187725707 43.0667208598982, 141.323148608288 43.0665791653542, 141.323164223312 43.0665169101045, 141.323296547535 43.0660050035433, 141.323447886105 43.0654532346831, 141.324766136368 43.0656383279583, 141.324984768297 43.065662110218, 141.324840500897 43.0662229417364)) ^^http://www.opengis.net/ont/geosparql#wktLiteral