メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38534544417 44.190153689855, 142.383900769083 44.1899114568337, 142.384667927752 44.187432001791, 142.384818554579 44.1874542740219, 142.386105981638 44.1876509924085, 142.38560779143 44.1892904240541, 142.38534544417 44.190153689855)) ^^http://www.opengis.net/ont/geosparql#wktLiteral