メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.897897998232 37.3971251321042, 136.898102722491 37.3974920970649, 136.897737611329 37.3976431895135, 136.8971925424 37.3978279436862, 136.896984391728 37.397898572354, 136.896770346905 37.3974386538353, 136.896654832307 37.3971905823479, 136.896967909804 37.397103441268, 136.897149629123 37.3970454239689, 136.897505374634 37.396909238077, 136.897737286982 37.3968371126547, 136.897897998232 37.3971251321042)) ^^http://www.opengis.net/ont/geosparql#wktLiteral