メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.366108049585 43.7750182860806, 142.366230038253 43.7752623194233, 142.366368618929 43.7755103442753, 142.366429796279 43.7757224070773, 142.366435468764 43.7759859309686, 142.365245498909 43.7756078405861, 142.364678366391 43.775446961905, 142.364627712513 43.7754302590778, 142.364354668924 43.774891902446, 142.365819782554 43.7744782261996, 142.366108049585 43.7750182860806)) ^^http://www.opengis.net/ont/geosparql#wktLiteral