メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.428245910945 43.7660012007618, 142.428287940675 43.7664012697131, 142.428331431478 43.766815330625, 142.427368899437 43.7668688487299, 142.426331116879 43.7669265167368, 142.426205699279 43.7669334937761, 142.425532080093 43.7669709273189, 142.42542696779 43.7659319156728, 142.425410802488 43.7657690040163, 142.426198002608 43.7657176325704, 142.427249724746 43.7656490094872, 142.42820238576 43.7655868418811, 142.428245910945 43.7660012007618)) ^^http://www.opengis.net/ont/geosparql#wktLiteral