メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.61850333166 34.9363021665337, 136.616081370242 34.9361093278623, 136.61587835661 34.9356017165966, 136.615789211156 34.9352248790955, 136.615679659093 34.9343367615293, 136.615981104446 34.9343572849718, 136.616928790577 34.9344344077327, 136.618124734555 34.9345157598623, 136.618120113485 34.9347838350297, 136.618133655226 34.9348219390249, 136.618678481703 34.9348574920987, 136.61850333166 34.9363021665337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral