メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355618291318 43.0529075812842, 141.355469050195 43.0534764386927, 141.355411714906 43.0536796619972, 141.355306563582 43.0540523642963, 141.355292623026 43.0541075351996, 141.353751022226 43.0538934802833, 141.353927290855 43.0532743409031, 141.354079902929 43.0527055129371, 141.355618291318 43.0529075812842)) ^^http://www.opengis.net/ont/geosparql#wktLiteral