メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348121168701 42.5508155237458, 141.349262861484 42.5513613138748, 141.350206771186 42.5517817471814, 141.349924177906 42.5521555376141, 141.349365422335 42.5528716579703, 141.349254833421 42.5530134289928, 141.349077860899 42.5532395016738, 141.348770944154 42.5536299808522, 141.347354669563 42.5533203170818, 141.346768665043 42.5531841662075, 141.346368095949 42.553100540336, 141.346674202899 42.5523310912113, 141.34686460107 42.5518932792858, 141.34714275966 42.5511745373998, 141.347467875928 42.5505241094464, 141.348121168701 42.5508155237458)) ^^http://www.opengis.net/ont/geosparql#wktLiteral