An area of broken, fast flowing water in a stream, where the slope of the bed increases (but without a prominent break of slope which might result in a cascade or waterfall), or where a gently dipping bar of harder rock outcrops
Data Dictionary for rapid_poly: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...
Further information on Topo50:
|Data type||Vector polygon||Feature count||170|
|Services||Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed|