メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.889154459726 43.0173378889803, 142.888141795165 43.0167076781816, 142.887970057239 43.0166025068426, 142.887933838195 43.016580343278, 142.887956258896 43.0165613698613, 142.888480406126 43.0161063064289, 142.888518453613 43.0161337340135, 142.888969829208 43.0157322418021, 142.890060777617 43.0164027990945, 142.890154149928 43.01646022957, 142.889183716289 43.0173125487138, 142.889154459726 43.0173378889803)) ^^http://www.opengis.net/ont/geosparql#wktLiteral