メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.860815236316 43.3298722208982, 141.860852852145 43.3298541338547, 141.860837571748 43.3297921231576, 141.862072046462 43.3295832092083, 141.862237697252 43.3301189649363, 141.862480997256 43.3308628725268, 141.861179908181 43.3310593282594, 141.860804461001 43.3311127002954, 141.860597575789 43.3303947940458, 141.860450661526 43.3299252774685, 141.860815236316 43.3298722208982)) ^^http://www.opengis.net/ont/geosparql#wktLiteral