メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.337676661252 43.0601495016044, 141.337481851685 43.0608482869886, 141.33736539137 43.0612892377851, 141.337011782881 43.0612419664273, 141.335822596975 43.0610829435977, 141.336096402405 43.0599489611765, 141.336260562531 43.0593967101133, 141.336446936766 43.0594213376234, 141.336548359702 43.0590179640413, 141.337071231671 43.0591044962978, 141.337598844452 43.0592593536007, 141.337527460959 43.0595584572535, 141.337811602373 43.0595939199643, 141.337676661252 43.0601495016044)) ^^http://www.opengis.net/ont/geosparql#wktLiteral