メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.241763020672 37.0399097200951, 138.242377448075 37.0407851997659, 138.24029865989 37.0417568176426, 138.23964516632 37.0408430138835, 138.238619475502 37.0393476876953, 138.237976947989 37.0384426299003, 138.239173738749 37.0379083621868, 138.240092138029 37.0374980905084, 138.240640949685 37.0382958489422, 138.241396703672 37.0393765902767, 138.241763020672 37.0399097200951)) ^^http://www.opengis.net/ont/geosparql#wktLiteral