メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.049678016336 42.9119933848535, 143.050432819235 42.9120424810717, 143.050289187373 42.9131578275399, 143.049532313305 42.913112331999, 143.048782546943 42.9130577794121, 143.048931838818 42.911945208415, 143.049678016336 42.9119933848535)) ^^http://www.opengis.net/ont/geosparql#wktLiteral