メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.378167708735 43.7530958922198, 142.377041273475 43.7534190030843, 142.376375778222 43.7522360319571, 142.377194352352 43.7519998865435, 142.378033495334 43.7517450251111, 142.378700629783 43.7529504353085, 142.378561641107 43.7529916585095, 142.378167708735 43.7530958922198)) ^^http://www.opengis.net/ont/geosparql#wktLiteral