メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.404033556213 44.1754076866934, 142.403022607122 44.1748040554816, 142.403387628014 44.1735372205204, 142.404038313278 44.1736262654644, 142.404166195903 44.1738620237816, 142.404384836677 44.1742263201201, 142.404487099661 44.1744341083226, 142.404489156727 44.1745622924394, 142.404489521218 44.1745849155989, 142.404436990933 44.1747226129624, 142.404214189145 44.1750977529478, 142.404033556213 44.1754076866934)) ^^http://www.opengis.net/ont/geosparql#wktLiteral