メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.409702587769 43.0219006834088, 141.410349309273 43.0219217430743, 141.409553740571 43.0226725966357, 141.409251233329 43.0229670312347, 141.409271689542 43.0229782236606, 141.40850971283 43.0236889465634, 141.407621086281 43.0232011420088, 141.407861140517 43.0229603364147, 141.408351887262 43.0224713469573, 141.40868937139 43.0221568446984, 141.408994734883 43.0218638393565, 141.409702587769 43.0219006834088)) ^^http://www.opengis.net/ont/geosparql#wktLiteral