メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.421281971006 43.8008435256322, 142.42168259634 43.8010832873869, 142.422076899518 43.8013430977599, 142.422507391396 43.8016136283784, 142.422138175248 43.8019377442864, 142.421340253279 43.8026261072175, 142.420289595668 43.8019666877404, 142.420080774822 43.8018468008183, 142.419284155578 43.801346464291, 142.420487078316 43.8003470269528, 142.420882194843 43.8005812251531, 142.421281971006 43.8008435256322)) ^^http://www.opengis.net/ont/geosparql#wktLiteral