メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.347697176438 43.0390974226094, 141.348036330384 43.039121687957, 141.3489368088 43.0391755530564, 141.34930324855 43.0392091029173, 141.349228180353 43.0398708806486, 141.349180198552 43.0401752426379, 141.34912978934 43.0405275512807, 141.347728888525 43.0404341554734, 141.347106269385 43.0403924611985, 141.347156743808 43.0400430373505, 141.347201460176 43.039733234657, 141.347254572334 43.039308437658, 141.347284849126 43.0390678662305, 141.347697176438 43.0390974226094)) ^^http://www.opengis.net/ont/geosparql#wktLiteral