メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.106981326968 43.8220014355583, 144.106580782881 43.8221264749679, 144.106161771224 43.8222572975122, 144.105507215178 43.8211747853819, 144.10598639833 43.8210363927653, 144.106645863954 43.8208677130527, 144.106665260683 43.8209482474564, 144.1066466964 43.8211513690073, 144.106705377479 43.8213711837805, 144.106881174694 43.8218098437764, 144.106981326968 43.8220014355583)) ^^http://www.opengis.net/ont/geosparql#wktLiteral