メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.892159166795 37.2384702883603, 136.8864515413 37.2384995243062, 136.892814546222 37.2336518924405, 136.894150945265 37.2350480764855, 136.894987988833 37.2358545497902, 136.895820732302 37.2366434050984, 136.896745356071 37.2374430264003, 136.897338176731 37.2380461714974, 136.897606067831 37.2384421554892, 136.892159166795 37.2384702883603)) ^^http://www.opengis.net/ont/geosparql#wktLiteral