メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.381524515974 43.7880638365935, 142.381994807288 43.7881741834957, 142.382290134685 43.7882556856093, 142.382063463384 43.7887429788689, 142.382045309469 43.7887694056943, 142.381893025196 43.789112752733, 142.380636884902 43.7886256971318, 142.380110768542 43.7880865647478, 142.37941035262 43.7873663845649, 142.380071045985 43.7871547652381, 142.380789982188 43.7869521128186, 142.381215897913 43.7874082180106, 142.381869856475 43.787688590574, 142.381524515974 43.7880638365935)) ^^http://www.opengis.net/ont/geosparql#wktLiteral