メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38933519072 43.682271874392, 142.388742011187 43.6832968106859, 142.387504084271 43.6829220931739, 142.386732427452 43.6826884791907, 142.38731529836 43.6816782648223, 142.388335103688 43.6799106698077, 142.388401305708 43.6797879125424, 142.389619265695 43.6801411571034, 142.39040576012 43.680369248349, 142.390121836659 43.6808841131415, 142.38933519072 43.682271874392)) ^^http://www.opengis.net/ont/geosparql#wktLiteral