River profile classification Catchment L

Longitudinal slope profiles derived for all 1:500 000 rivers of South Africa, including cross-border catchments extending into neighbouring countries. River main stems are identified by a unique reach number (REACHNUM) within each primary catchment.本数据集包含针对南非全境所有1:50万比例尺河流推导得到的纵坡剖面，涵盖延伸至周边国家的跨境流域。河流干流在每个一级流域内以唯一的河段编号（REACHNUM）进行标识。