メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.362723153454 43.1153662838337, 141.362548408454 43.1160702156864, 141.3619089583 43.1159831872906, 141.361500037398 43.1159338810628, 141.361089349893 43.1158806215684, 141.361281829111 43.1151665644707, 141.361375586323 43.1147390162655, 141.36282387076 43.1149413184063, 141.362723153454 43.1153662838337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral