snow depth - manual measurement

Manual measurements of snow depths at individual points or along transects, obtained during annual surveys at the end of the snow season. Missing information is indicated by -9999 for numerical and '-' for text columns.本数据集收录了雪季末期年度调查期间，于单点位置或断面沿线获取的雪深手动测量数据。数值型列的缺失信息以-9999标记，文本型列的缺失信息以'-'标记。