メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.412509787561 43.7970913787983, 142.411100697951 43.7982801717894, 142.410832449931 43.798121971187, 142.410620150161 43.7979873028958, 142.410392772487 43.7978720805346, 142.409436469158 43.7973318956239, 142.408884422975 43.7970657338674, 142.410438928812 43.7957984983127, 142.411429610314 43.796438150696, 142.412509787561 43.7970913787983)) ^^http://www.opengis.net/ont/geosparql#wktLiteral