メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.40634600959 44.1768647614262, 142.406312453297 44.1768431682343, 142.405730494872 44.1764752555397, 142.405690453566 44.1764499447612, 142.405760373154 44.176191173877, 142.405718707597 44.176096390525, 142.406108037022 44.1748052932851, 142.406944867952 44.1749326707061, 142.406639399816 44.1759542567743, 142.406518414902 44.1763296829582, 142.40634600959 44.1768647614262)) ^^http://www.opengis.net/ont/geosparql#wktLiteral