メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.446075595518 43.8124684240006, 142.446607090234 43.812811938362, 142.446628493859 43.8127943918007, 142.447118507174 43.8131021111341, 142.447253800609 43.8131824820815, 142.44764817973 43.8134383979897, 142.447397451364 43.8136315104951, 142.446767900824 43.814143352588, 142.446613531358 43.814268860697, 142.446098240412 43.8139400319518, 142.445610519231 43.8136367323506, 142.445062843828 43.8133015542429, 142.444578025563 43.8129847429746, 142.445574707954 43.8121435228826, 142.446075595518 43.8124684240006)) ^^http://www.opengis.net/ont/geosparql#wktLiteral