メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.356001896995 44.4823305439699, 142.355933980258 44.4824650807302, 142.355829876197 44.4826713707733, 142.355801183224 44.4827314098515, 142.35463727626 44.482449229625, 142.354742400237 44.4822080286106, 142.354670025823 44.4821924152493, 142.353654623786 44.4819244673641, 142.353784705392 44.4816522735876, 142.354881972718 44.4819253486584, 142.354827615585 44.4820582540043, 142.356001896995 44.4823305439699)) ^^http://www.opengis.net/ont/geosparql#wktLiteral