メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.453685405588 43.0345894702824, 144.453861510979 43.0350042418986, 144.454051104604 43.0354154468192, 144.453071582511 43.0356525489232, 144.451927758493 43.0359278294185, 144.450959484888 43.0361636414429, 144.450658992036 43.0357497835595, 144.450165500705 43.0350700041041, 144.451406147196 43.0347680517812, 144.4525274108 43.0344951095783, 144.453524223195 43.0342593668491, 144.453685405588 43.0345894702824)) ^^http://www.opengis.net/ont/geosparql#wktLiteral