メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399764493964 44.1839924214585, 142.399722580422 44.1841101682612, 142.399694316949 44.1841058093973, 142.397915397602 44.1838311827885, 142.39808229626 44.1832249991645, 142.398269467628 44.1825996450093, 142.400142555084 44.1829106742694, 142.399925747961 44.1835313933953, 142.399764493964 44.1839924214585)) ^^http://www.opengis.net/ont/geosparql#wktLiteral