メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.392577539397 44.1698245440198, 142.391639978821 44.1696437400957, 142.391899387111 44.1689176990097, 142.391958454608 44.16895373467, 142.392833969268 44.169098047839, 142.392892558569 44.1691076974626, 142.392779704347 44.1694829243508, 142.392697595919 44.1694731814425, 142.392577539397 44.1698245440198)) ^^http://www.opengis.net/ont/geosparql#wktLiteral