メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.405147794626 44.1761068330493, 142.404974353197 44.1759971806597, 142.404669200867 44.175805999288, 142.404033556213 44.1754076866934, 142.404214189145 44.1750977529478, 142.404436990933 44.1747226129624, 142.404489521218 44.1745849155989, 142.404776838169 44.174619000078, 142.40504790797 44.174651138286, 142.405568924212 44.1747269026365, 142.405147794626 44.1761068330493)) ^^http://www.opengis.net/ont/geosparql#wktLiteral