メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.779319179377 35.4123283519724, 136.777677690123 35.4123943726125, 136.777687378237 35.4126068594332, 136.776479700714 35.4126511533661, 136.776465383906 35.4122210201388, 136.777661330353 35.4121734843776, 136.779251946642 35.4121141683709, 136.779319179377 35.4123283519724)) ^^http://www.opengis.net/ont/geosparql#wktLiteral