メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.879373606956 43.3426419558486, 141.879495951581 43.3430107324802, 141.879643949637 43.3435107545045, 141.877491861267 43.3438486466312, 141.87623309052 43.3440655745323, 141.876138830763 43.3437508307836, 141.87621674706 43.3437415913796, 141.876075006357 43.3431912331264, 141.875874565972 43.3424128915761, 141.879163944681 43.3418967105439, 141.879342833578 43.3425211722329, 141.879373606956 43.3426419558486)) ^^http://www.opengis.net/ont/geosparql#wktLiteral