メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.40269938706 43.8122077606796, 142.403160717337 43.8118803254222, 142.404819522068 43.8130967207545, 142.404587468393 43.8132515831926, 142.40436498081 43.8134251201415, 142.403978313354 43.8137160337401, 142.402487192847 43.8148077116688, 142.402299945742 43.8149438222478, 142.401468890239 43.8143327894069, 142.401446013259 43.8143159618019, 142.400635698942 43.8137254285122, 142.400993792048 43.81341979803, 142.401189199159 43.8132856841359, 142.401426655152 43.8131130993155, 142.401839089458 43.8128034558314, 142.402281475976 43.8125036151823, 142.40269938706 43.8122077606796)) ^^http://www.opengis.net/ont/geosparql#wktLiteral