メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.503180989984 33.2737950654307, 131.503081523856 33.2743501624997, 131.502968040789 33.2749251097137, 131.50179667511 33.2748562490248, 131.501863959392 33.2742743746385, 131.501899239496 33.2740021604749, 131.501939696384 33.273690089029, 131.502023550735 33.2730448526944, 131.503295276642 33.2732003366545, 131.503180989984 33.2737950654307)) ^^http://www.opengis.net/ont/geosparql#wktLiteral