メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.399497665205 43.7841002298505, 142.399832382202 43.7842940965612, 142.400171296449 43.7845208681204, 142.399189297511 43.7853666755805, 142.398829780676 43.7851489118289, 142.398478486223 43.7849251406385, 142.398147845401 43.7847103260391, 142.397809026634 43.7845194309684, 142.397680952898 43.7844508367974, 142.399175376649 43.7839212710932, 142.399497665205 43.7841002298505)) ^^http://www.opengis.net/ont/geosparql#wktLiteral