メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.326260701519 43.7689629429517, 142.325967796326 43.7688914807051, 142.325362983626 43.7687678703373, 142.324807621555 43.7686552479322, 142.325020047526 43.7683193052247, 142.32558220344 43.7675641562635, 142.325669251267 43.7674395064716, 142.326878651147 43.7678047372111, 142.326595928143 43.7682686798009, 142.326425985003 43.7686162523072, 142.326260701519 43.7689629429517)) ^^http://www.opengis.net/ont/geosparql#wktLiteral