メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.039687792421 43.5739472873667, 142.038527446399 43.573683249532, 142.038399659826 43.5736595302421, 142.038406942231 43.5732361106605, 142.038770893243 43.5732335286705, 142.038868612445 43.5732111293521, 142.038890886823 43.573182124332, 142.038900133915 43.5730821021126, 142.03877218531 43.5728624205564, 142.039341137945 43.5726085093591, 142.039517841818 43.5728476163542, 142.039814183359 43.5731450259697, 142.0399496332 43.573273858383, 142.039687792421 43.5739472873667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral