メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.312489031891 43.0572855448606, 141.312533449696 43.0572910426885, 141.313273506203 43.0574027379669, 141.313070269018 43.0582970659339, 141.31283998877 43.0591657120933, 141.312711655053 43.0591470788766, 141.312105862706 43.0590663701744, 141.311454638166 43.0589774798931, 141.311401119468 43.0589712030188, 141.311529471859 43.0584606128507, 141.311535191964 43.0584377322931, 141.311761809624 43.0575523904379, 141.311847849156 43.0572060221925, 141.311868907157 43.0572087271385, 141.312142018963 43.0572425436061, 141.312489031891 43.0572855448606)) ^^http://www.opengis.net/ont/geosparql#wktLiteral