メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.666503709086 32.5818115275692, 131.666483675399 32.5818086392971, 131.666459459629 32.5822086397191, 131.665506928554 32.5821362016071, 131.665531717508 32.5816724347551, 131.665533073518 32.5816587241921, 131.665577103277 32.581090122793, 131.666537693562 32.5812525268184, 131.666503709086 32.5818115275692)) ^^http://www.opengis.net/ont/geosparql#wktLiteral