メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.352085434916 44.4777498616425, 142.351335785873 44.4775689497805, 142.351381839166 44.4774731787337, 142.351891070694 44.4764006164594, 142.352658680113 44.476591214183, 142.352576734374 44.4767567360768, 142.35252974919 44.476857643119, 142.352154019153 44.4776645118614, 142.352130167543 44.4776585914774, 142.352085434916 44.4777498616425)) ^^http://www.opengis.net/ont/geosparql#wktLiteral