メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.226478956968 36.6922350183337, 137.226495720705 36.6922358552786, 137.227638998327 36.6922998400745, 137.227559638291 36.6927298470278, 137.227614069277 36.6932883442323, 137.226762083673 36.6933720637888, 137.226304165901 36.6934096087088, 137.225990942559 36.6933873045586, 137.225964625777 36.6935529812619, 137.225153892369 36.693487057044, 137.225111950936 36.6933467588838, 137.225091780986 36.6932831231974, 137.224950040379 36.6925676632129, 137.224971365908 36.6921654976174, 137.226478956968 36.6922350183337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral