メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.858956626657 35.2326900087715, 136.860257301731 35.2327714911109, 136.860181953874 35.2336198477006, 136.859996668073 35.2356609908745, 136.858697828108 35.2355891573099, 136.856940857892 35.2354881040195, 136.856987135553 35.2352427222963, 136.857130542004 35.2344880677335, 136.857333856 35.2334744035961, 136.857492759348 35.2326156296103, 136.858956626657 35.2326900087715)) ^^http://www.opengis.net/ont/geosparql#wktLiteral