メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.396158268767 44.1636703845638, 142.394758644149 44.1634277318242, 142.39511003527 44.1622715926112, 142.39581048964 44.162376655795, 142.395844501386 44.1622453137395, 142.396508951711 44.1623413101892, 142.396483051074 44.1624293979548, 142.396310767583 44.1631048752322, 142.396158268767 44.1636703845638)) ^^http://www.opengis.net/ont/geosparql#wktLiteral