メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.409609715838 44.1759633874619, 142.409129199405 44.1763520657089, 142.408402020333 44.1769402347035, 142.407985289232 44.1772772911846, 142.407548707307 44.1776379813813, 142.40634600959 44.1768647614262, 142.406518414902 44.1763296829582, 142.406639399816 44.1759542567743, 142.406919391868 44.175977289469, 142.407289193801 44.1756378063452, 142.407931037635 44.1750465659755, 142.407876305373 44.1748574025813, 142.408238235661 44.1745884876601, 142.409166771614 44.1752248954445, 142.40990079453 44.1757279455943, 142.409609715838 44.1759633874619)) ^^http://www.opengis.net/ont/geosparql#wktLiteral