メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.85400857045 43.3257687176576, 141.85357683324 43.3258346719723, 141.853128470551 43.3259057711227, 141.852695192132 43.3259677080703, 141.852175715373 43.3260458712306, 141.851499051517 43.3236646988535, 141.85244089936 43.3235199925864, 141.852865479676 43.3234528913568, 141.85329544319 43.3233837681229, 141.85400857045 43.3257687176576)) ^^http://www.opengis.net/ont/geosparql#wktLiteral