メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.243866191224 34.8258711602134, 137.24243140243 34.8260523981877, 137.242143943667 34.8255454646626, 137.242963421796 34.8250040107779, 137.243741916595 34.824485116884, 137.244111360915 34.8249807249559, 137.244261991439 34.825307435756, 137.244426330608 34.8256792146211, 137.243866191224 34.8258711602134)) ^^http://www.opengis.net/ont/geosparql#wktLiteral