メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.147415273325 39.4249741317538, 141.146598857107 39.4250079611836, 141.144271661525 39.425090093633, 141.144146945405 39.4243679189048, 141.144121421823 39.4233733846953, 141.145849552991 39.4233159565853, 141.146659166144 39.4232873823291, 141.147284801603 39.4232012873772, 141.149051850991 39.4228954932989, 141.148859961977 39.4237832638717, 141.148898505242 39.4249279016539, 141.147415273325 39.4249741317538)) ^^http://www.opengis.net/ont/geosparql#wktLiteral