メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.570958697006 42.9805510870396, 141.570587292475 42.9805931240864, 141.570501974586 42.9806035893933, 141.5699698839 42.9806716084705, 141.569511846367 42.9806909726391, 141.569227667357 42.9807015222416, 141.569193072305 42.9802032965732, 141.570477177514 42.9802759067951, 141.570540654143 42.9802787445736, 141.57081238068 42.9798803791678, 141.570892596866 42.9798808547173, 141.571216367263 42.9805207533706, 141.570958697006 42.9805510870396)) ^^http://www.opengis.net/ont/geosparql#wktLiteral