メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.360263944726 43.0683062215243, 141.360204046659 43.0685344675956, 141.360158258357 43.0687090918937, 141.358589258164 43.0687568735337, 141.358750855802 43.0681570246666, 141.358780154177 43.0680482426502, 141.358823547389 43.0678869624108, 141.359633449369 43.06799939313, 141.360319380433 43.0680946083041, 141.360263944726 43.0683062215243)) ^^http://www.opengis.net/ont/geosparql#wktLiteral