メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.329673615331 37.2905621549329, 140.329691978657 37.2906882333625, 140.329683155621 37.2907869689568, 140.328769929481 37.2910360658962, 140.328781262659 37.2908362261835, 140.328831178768 37.2907221097527, 140.328920832429 37.2903929716761, 140.329632325887 37.2902787594805, 140.329673615331 37.2905621549329)) ^^http://www.opengis.net/ont/geosparql#wktLiteral