メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.115025224287 43.5428064538252, 142.115016008709 43.5428528575324, 142.114694905725 43.5430939768467, 142.114975346792 43.5431151192972, 142.114710923876 43.5450707652605, 142.114586442825 43.5450904171691, 142.114121416518 43.5451198673311, 142.112520324465 43.545207893748, 142.112840574839 43.5429502374299, 142.112971479699 43.5420280531477, 142.113967357671 43.5420833751391, 142.115149183034 43.5421784266265, 142.115091276999 43.5424740026962, 142.115025224287 43.5428064538252)) ^^http://www.opengis.net/ont/geosparql#wktLiteral