メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.457338019306 43.4631720104831, 142.456764200058 43.463446189354, 142.457500300713 43.4619922720979, 142.457608427608 43.4617796215628, 142.458293063674 43.4603853268894, 142.458504666344 43.4599517361434, 142.459105158131 43.4606107602414, 142.45945593998 43.4609898479593, 142.459835498926 43.4614106226923, 142.46022936639 43.4618292933116, 142.459515999828 43.4618138244933, 142.459449955614 43.4620698271167, 142.459358814362 43.4622303025234, 142.458287482514 43.4627237948498, 142.457338019306 43.4631720104831)) ^^http://www.opengis.net/ont/geosparql#wktLiteral