メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.105633997743 43.8186595833658, 144.104320399612 43.8190363445761, 144.103807394953 43.818157029105, 144.103501397124 43.8176586843655, 144.103879782449 43.8175339105123, 144.10457260816 43.8172831098747, 144.104755806849 43.8171903702619, 144.105470703508 43.8184545652134, 144.105504549256 43.8184436090362, 144.105633997743 43.8186595833658)) ^^http://www.opengis.net/ont/geosparql#wktLiteral