メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.444564529371 43.8171389750063, 142.445349239646 43.8176373335275, 142.445707011865 43.8178583887504, 142.444540489017 43.8188209008606, 142.444187676325 43.8186101172245, 142.443683874046 43.8182905744803, 142.443412029129 43.8181145662642, 142.443173559406 43.8179682106499, 142.442613192804 43.8176100653146, 142.443149902942 43.8171725761046, 142.443771802741 43.8166422242789, 142.444564529371 43.8171389750063)) ^^http://www.opengis.net/ont/geosparql#wktLiteral