メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406094609419 43.8121667994289, 142.405876454587 43.8123382938252, 142.405272689397 43.8127732260543, 142.404819522068 43.8130967207545, 142.403160717337 43.8118803254222, 142.403593532789 43.8115676947576, 142.404061655786 43.811241248415, 142.404559453045 43.8108320626795, 142.406473799582 43.809448389369, 142.407042003872 43.8097854919227, 142.407875073125 43.8102797212568, 142.408405625675 43.8105944696303, 142.406094609419 43.8121667994289)) ^^http://www.opengis.net/ont/geosparql#wktLiteral