メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.883783108443 43.0169737037292, 142.883068861443 43.0165577119565, 142.883031015708 43.0165356261022, 142.883091694404 43.0164851465266, 142.884039937824 43.0156534690755, 142.884247002304 43.0157881309147, 142.884777133338 43.0161113854534, 142.883887127811 43.0168834594902, 142.883820109394 43.0169415695791, 142.883783108443 43.0169737037292)) ^^http://www.opengis.net/ont/geosparql#wktLiteral