メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.369791626187 43.7765101403179, 142.370245285039 43.7773032698671, 142.369595512496 43.7774879895474, 142.368976016162 43.7776743635693, 142.368543336588 43.7768693748735, 142.368264480449 43.7761288220929, 142.368965636907 43.7759479945734, 142.369443010683 43.7758270256292, 142.369800273153 43.7765082510573, 142.369791626187 43.7765101403179)) ^^http://www.opengis.net/ont/geosparql#wktLiteral