メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.185736653432 34.8137365149225, 137.185381441939 34.8137816436605, 137.185149183353 34.8137816791798, 137.18498523213 34.8137704355993, 137.184821272439 34.8136915814843, 137.184534344008 34.8135564033665, 137.184384055079 34.8135226185512, 137.18406982446 34.8135001235848, 137.184165371177 34.8129141548829, 137.185763853698 34.8129927968931, 137.185736653432 34.8137365149225)) ^^http://www.opengis.net/ont/geosparql#wktLiteral