メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.767283024934 42.1887098766717, 142.767862634173 42.1892464249698, 142.767939973777 42.1893179638907, 142.766045998965 42.1904164673964, 142.765104271905 42.1909236203903, 142.765063540251 42.190892712161, 142.764873567991 42.19074823778, 142.763435876475 42.1896550887415, 142.764148380113 42.1892491382678, 142.764571838697 42.188995065363, 142.766384008993 42.187907724785, 142.766405776166 42.1878977790188, 142.767283024934 42.1887098766717)) ^^http://www.opengis.net/ont/geosparql#wktLiteral