メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.524724969855 43.8503003023231, 141.524626212828 43.8504873614751, 141.524421150705 43.8508587078948, 141.520557601379 43.8498731059538, 141.520746360514 43.8495055829281, 141.520774185161 43.8494469365997, 141.520824803166 43.8493677619624, 141.521014515203 43.8493967487741, 141.521849950312 43.8495957700399, 141.522267543886 43.849703680583, 141.524724969855 43.8503003023231)) ^^http://www.opengis.net/ont/geosparql#wktLiteral