メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.59752203731 42.7810124265068, 141.597579989988 42.7815626201874, 141.597735773248 42.7830666647053, 141.597373378329 42.783088652505, 141.595271260033 42.7832277171314, 141.595237818008 42.7829219992677, 141.59508206768 42.7817150371755, 141.595025726027 42.7811590843862, 141.594984742785 42.7808716092956, 141.594900243873 42.7798214760849, 141.594856489133 42.779507117579, 141.597377124568 42.7793515994664, 141.59752203731 42.7810124265068)) ^^http://www.opengis.net/ont/geosparql#wktLiteral