メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.858329230864 43.3320327478536, 141.858401285029 43.3322460873455, 141.858478049097 43.3325097991195, 141.858569183737 43.3328228584593, 141.857769953187 43.3329431983774, 141.85653368896 43.3331351025871, 141.856501023734 43.3331401241743, 141.855318586281 43.333323689198, 141.854929569181 43.3320312018705, 141.856620240301 43.3317673117169, 141.857036838039 43.3316965148956, 141.858188382816 43.3315116977675, 141.858329230864 43.3320327478536)) ^^http://www.opengis.net/ont/geosparql#wktLiteral