メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.128360581531 35.0621015728728, 137.12817953146 35.0625495657776, 137.128166111145 35.0626206908448, 137.128176502734 35.06268731937, 137.128210677784 35.0627864913806, 137.127510906696 35.0629300625791, 137.127487266199 35.0628606845425, 137.127473487572 35.0628140572903, 137.127469757495 35.0627348980663, 137.127513129511 35.0618357083669, 137.128323935667 35.0620900759684, 137.128360581531 35.0621015728728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral