メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((135.821574639516 34.6858992431445, 135.821577001928 34.6858162794117, 135.82148096669 34.6858143082894, 135.821482130879 34.6857782494533, 135.821616437521 34.6857460468403, 135.82176377565 34.6857452763062, 135.821764546098 34.6858985347143, 135.821574639516 34.6858992431445)) ^^http://www.opengis.net/ont/geosparql#wktLiteral