メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38921072123 43.7683086923824, 142.389260826191 43.7687967542622, 142.389310925338 43.7692715081046, 142.387626899064 43.7692025183093, 142.387674796314 43.7687276637679, 142.387707391432 43.7682553971134, 142.387721801206 43.7680193974332, 142.387738446527 43.7677112622002, 142.387745264441 43.7675171126967, 142.387728393914 43.7673281779089, 142.387702846158 43.7669796406462, 142.387993138814 43.7668772927975, 142.389047186864 43.7665141351271, 142.3890900493 43.7670027504961, 142.389131821736 43.7674923509571, 142.38921072123 43.7683086923824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral