メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.988319341086 43.5556392613904, 144.987708353134 43.5560806692889, 144.986901967393 43.5556286133931, 144.986469605245 43.5553946508999, 144.986448590508 43.5553832355292, 144.986857245241 43.5550513857285, 144.986936388832 43.5550909424334, 144.987165771856 43.5549040598144, 144.987211584142 43.5549335151118, 144.987407327512 43.5550582454154, 144.987986251464 43.5554325632797, 144.988319341086 43.5556392613904)) ^^http://www.opengis.net/ont/geosparql#wktLiteral