メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.376493776439 43.7682179132226, 142.376612986602 43.7684356207317, 142.376793762349 43.7687657760547, 142.377090744301 43.7693081405946, 142.375568318831 43.7697559956716, 142.375265971027 43.7692106078653, 142.37494476946 43.7686561700496, 142.374636088949 43.7680835059191, 142.376177428623 43.7676619971161, 142.376493776439 43.7682179132226)) ^^http://www.opengis.net/ont/geosparql#wktLiteral