メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.307931424244 43.1052172447149, 141.308271175142 43.1055319435002, 141.308602813571 43.1058502319765, 141.308975604361 43.1062078911741, 141.308960009663 43.1062171160155, 141.30857155569 43.1064367222004, 141.308234531458 43.1066009809439, 141.307833262209 43.1068297641411, 141.306809903547 43.1058150867664, 141.306465184933 43.1054929581934, 141.307587101066 43.1048691007483, 141.307931424244 43.1052172447149)) ^^http://www.opengis.net/ont/geosparql#wktLiteral