メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.995913158045 37.7304732006309, 138.99485586252 37.7307523163159, 138.992549929798 37.7313828346287, 138.992393487275 37.7310108192876, 138.991907142934 37.7298949851097, 138.993256536109 37.7295462531354, 138.995295073049 37.7289900539514, 138.995337532152 37.7289442575982, 138.995911662328 37.7292265229108, 138.996536953128 37.7295046272858, 138.997753244786 37.7299611543251, 138.997541058369 37.7300389192908, 138.995913158045 37.7304732006309)) ^^http://www.opengis.net/ont/geosparql#wktLiteral