メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373956417625 43.8305793961817, 142.373426935446 43.830925048584, 142.372907099935 43.8312284089039, 142.372727755525 43.8313540031159, 142.371811778987 43.8319954425722, 142.370712045647 43.8329983790333, 142.369558395577 43.8338147402276, 142.368002129336 43.8327229888945, 142.369201901107 43.8318590589707, 142.370433171168 43.8309581290269, 142.37130358425 43.8303230725549, 142.371419134108 43.8302387649314, 142.37188539683 43.8298932047096, 142.372490104102 43.8294647291333, 142.373956417625 43.8305793961817)) ^^http://www.opengis.net/ont/geosparql#wktLiteral