メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.427633856858 43.8065054479822, 142.427289629929 43.8062925933702, 142.426622516532 43.8058806824512, 142.425519602253 43.805215999692, 142.426676183707 43.8042389243099, 142.427422145495 43.8047000079786, 142.427746180569 43.8049213853064, 142.428080798865 43.8051257802014, 142.428434551284 43.8053316916008, 142.428767111101 43.8055561290346, 142.427633856858 43.8065054479822)) ^^http://www.opengis.net/ont/geosparql#wktLiteral