メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.025756136213 39.3625049448972, 141.021912907221 39.3638344763806, 141.020947060917 39.3620876234446, 141.024757182856 39.3607639621677, 141.025756136213 39.3625049448972)) ^^http://www.opengis.net/ont/geosparql#wktLiteral