メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.702589748191 44.3645991110799, 141.70219107541 44.3648506089231, 141.702034295396 44.3649559252129, 141.701866273671 44.3648214837208, 141.701383701344 44.3644315476857, 141.701143440456 44.3642398375317, 141.700966238081 44.3640971945334, 141.701720169149 44.3635984952239, 141.7020231188 44.3634054615732, 141.70274816924 44.3639805732453, 141.703112794456 44.3642692095469, 141.702589748191 44.3645991110799)) ^^http://www.opengis.net/ont/geosparql#wktLiteral