メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.880923520964 43.0194738487236, 142.880738959284 43.0193375810861, 142.880231778947 43.0190334514838, 142.880344007327 43.018934093089, 142.881103178589 43.0182619321602, 142.881370099215 43.0184289717952, 142.881801684384 43.018693916976, 142.881425006433 43.0190211933745, 142.881038056534 43.0193705377123, 142.880923520964 43.0194738487236)) ^^http://www.opengis.net/ont/geosparql#wktLiteral