メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364546856885 43.0903727129024, 141.364458864828 43.0906783809764, 141.364374999539 43.0909840115714, 141.364289903458 43.0913814097461, 141.363726783153 43.0913097453237, 141.362743830312 43.0911787727378, 141.362856844855 43.0907822954054, 141.363112258309 43.0897354019065, 141.363654402407 43.0898100707898, 141.363877497042 43.0898439383456, 141.364668748196 43.089945498171, 141.364546856885 43.0903727129024)) ^^http://www.opengis.net/ont/geosparql#wktLiteral