メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.129843444396 42.9813804297786, 144.128274474337 42.9806192133974, 144.126906853748 42.9799768351414, 144.127264900139 42.9795739537681, 144.127970974612 42.9787794651123, 144.128400115893 42.9782897526778, 144.131132009202 42.9796537742429, 144.130588508969 42.9803130408288, 144.130694092618 42.9803642631209, 144.129843444396 42.9813804297786)) ^^http://www.opengis.net/ont/geosparql#wktLiteral