メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.390929916429 43.7827112941955, 142.39102144717 43.7829343498923, 142.390523670854 43.7826204922123, 142.390051073652 43.7822935086592, 142.390046678581 43.7822904679542, 142.390256395787 43.7820882302147, 142.390480701795 43.7822096865599, 142.390550788407 43.7822451140919, 142.390683888415 43.7822855290785, 142.390740129283 43.7823868994323, 142.390929916429 43.7827112941955)) ^^http://www.opengis.net/ont/geosparql#wktLiteral