メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.917965233378 37.7854750447553, 138.916681497921 37.7856894834431, 138.916602708961 37.7854322634603, 138.915728356153 37.7855635928694, 138.915700033073 37.7854555684018, 138.91565650123 37.7853081771549, 138.914972257769 37.7854154657357, 138.914828530954 37.7848612705779, 138.914566573829 37.7838468385323, 138.91614637115 37.7835994209054, 138.917363045323 37.7834045104293, 138.917589232317 37.7835585766251, 138.919925717865 37.7851640052055, 138.919469359954 37.7852444642917, 138.917965233378 37.7854750447553)) ^^http://www.opengis.net/ont/geosparql#wktLiteral