メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.36674001941 43.7697403497734, 142.367890790658 43.7716705744492, 142.367055875853 43.7719020431454, 142.366318311157 43.7721340931134, 142.365866710097 43.7713434676473, 142.365215261225 43.7701910089195, 142.364919828495 43.769650006452, 142.366442085191 43.7692088633823, 142.36674001941 43.7697403497734)) ^^http://www.opengis.net/ont/geosparql#wktLiteral