メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348368929907 44.4794367818082, 142.348199083057 44.4793941083124, 142.347696913611 44.4792679430244, 142.347792479864 44.479027356605, 142.348066502416 44.478498823924, 142.348149949458 44.4783236381973, 142.348681142974 44.4784425688545, 142.348814556005 44.4784724428089, 142.348368929907 44.4794367818082)) ^^http://www.opengis.net/ont/geosparql#wktLiteral