メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.477050110868 43.8726077050211, 142.476682953215 43.8728540167162, 142.475988735523 43.8722878927311, 142.475219454381 43.8716604262397, 142.475632685507 43.8714014927807, 142.476671869647 43.8707378175275, 142.477806517146 43.8700010831365, 142.478201282406 43.8702959033512, 142.478750724345 43.8707372575337, 142.479273434298 43.8711571104453, 142.478670135893 43.8715423160293, 142.478293819285 43.8717982312258, 142.477050110868 43.8726077050211)) ^^http://www.opengis.net/ont/geosparql#wktLiteral