メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.968108990284 38.5787903489437, 140.968564944828 38.5802512973517, 140.967899095071 38.5802160239429, 140.96667360979 38.5801135319983, 140.966632154997 38.5801038661052, 140.96627013906 38.5800887907127, 140.96597426212 38.5792117079778, 140.965912922732 38.5789990740485, 140.965647349437 38.5781840357169, 140.966036286173 38.5781119455379, 140.967774617988 38.5777721232316, 140.968108990284 38.5787903489437)) ^^http://www.opengis.net/ont/geosparql#wktLiteral