メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.825048244734 35.3941800901158, 136.824228262572 35.3940042717703, 136.824505177004 35.3931086679965, 136.825356177722 35.3932839372502, 136.825048244734 35.3941800901158)) ^^http://www.opengis.net/ont/geosparql#wktLiteral