メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.293593311355 43.0668584739682, 141.29314114463 43.0671042201878, 141.293524838517 43.0674311527101, 141.293043765935 43.0676848156566, 141.292588320336 43.0679249061992, 141.292496697531 43.0678519822979, 141.291590238278 43.067129991702, 141.291909167166 43.0669524799811, 141.292045406465 43.0668767507638, 141.292517543409 43.0666115539974, 141.293443244095 43.066108849524, 141.294055681021 43.0666102790254, 141.293593311355 43.0668584739682)) ^^http://www.opengis.net/ont/geosparql#wktLiteral