メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.811203229648 37.0171245287327, 137.811144232029 37.0168273702208, 137.811794378568 37.0168159180895, 137.81175705793 37.0168604089702, 137.811764620241 37.0169565519775, 137.811785934734 37.0172268111538, 137.811747451067 37.0172836159247, 137.811429555812 37.0172817798125, 137.811319813292 37.0173496462717, 137.811203229648 37.0171245287327)) ^^http://www.opengis.net/ont/geosparql#wktLiteral