メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.052990032387 42.9210987095778, 143.051652852455 42.9210015864751, 143.050816008028 42.920936470112, 143.050906591512 42.9203496903569, 143.051106588063 42.9184362430679, 143.051200652231 42.9184436040887, 143.051924027435 42.9184981867094, 143.052596195588 42.9185443315255, 143.052697050426 42.9185512917731, 143.053383581354 42.9185981047191, 143.053186345305 42.9198935991599, 143.052990032387 42.9210987095778)) ^^http://www.opengis.net/ont/geosparql#wktLiteral