メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.782847947366 35.4161644979728, 136.780498252247 35.4162453574984, 136.780440047805 35.4160127523067, 136.780360054893 35.4157672621146, 136.78281919456 35.4156969256958, 136.782847947366 35.4161644979728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral