メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.720914771947 34.4887364873556, 135.720893704295 34.4895307858857, 135.719720324773 34.4895280957902, 135.719720497638 34.4894761166592, 135.719743101277 34.4887283082976, 135.719759287229 34.4881137444267, 135.720922371631 34.4881178187611, 135.720914771947 34.4887364873556)) ^^http://www.opengis.net/ont/geosparql#wktLiteral