メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.179751816814 35.3590734695859, 137.17933437438 35.3587786524723, 137.178579601148 35.3582662595434, 137.178120859085 35.3579643998785, 137.178335953429 35.3577287476511, 137.178405177519 35.3575341637532, 137.178511117622 35.3575954921126, 137.180053013475 35.3585319605553, 137.179751816814 35.3590734695859)) ^^http://www.opengis.net/ont/geosparql#wktLiteral