メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.909067454985 43.8068938316458, 143.909530882586 43.8073660807246, 143.910811290044 43.8087128107101, 143.910917708686 43.8088247402062, 143.910277304544 43.809135534938, 143.909557122135 43.8095182941318, 143.908179019639 43.8080585586449, 143.907716307452 43.8075768340181, 143.906866368857 43.8067160268112, 143.9055852167 43.8053868260451, 143.906938450356 43.8047098658709, 143.908061341252 43.8058774337168, 143.909067454985 43.8068938316458)) ^^http://www.opengis.net/ont/geosparql#wktLiteral