メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.50455135331 40.6040073073565, 140.502597234123 40.603880258251, 140.502790570904 40.6025235698506, 140.502976758927 40.6013442940988, 140.50434780469 40.6014665766122, 140.504915942842 40.6015144999577, 140.50466723904 40.6030437098505, 140.504615323707 40.6034753603157, 140.50455135331 40.6040073073565)) ^^http://www.opengis.net/ont/geosparql#wktLiteral