メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.441225178677 37.7570273040215, 140.441108014311 37.756989473344, 140.441006753629 37.7569721151871, 140.440928911026 37.7568802999988, 140.440815607461 37.7567184148881, 140.441045103505 37.7566690816048, 140.441352326526 37.7566872081802, 140.441348292502 37.7566979280034, 140.441343086647 37.7567118940307, 140.441225178677 37.7570273040215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral