メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.40146433037 44.1696802961411, 142.400430137688 44.169504017236, 142.39941257596 44.1693479241597, 142.399392321121 44.1693449623243, 142.399722579243 44.1683133324108, 142.401757457592 44.1686405920544, 142.401711242472 44.168785348762, 142.401674864293 44.1688993445596, 142.40146433037 44.1696802961411)) ^^http://www.opengis.net/ont/geosparql#wktLiteral