メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.325388795458 43.7609740377183, 142.325545548233 43.7610106769854, 142.326048097378 43.7611539752719, 142.325411113211 43.7622316874527, 142.324786339782 43.7620300122103, 142.324168504979 43.7618400016485, 142.324794011248 43.760787355434, 142.325388795458 43.7609740377183)) ^^http://www.opengis.net/ont/geosparql#wktLiteral