National land cover data 2018: additional layer low mountain forest

Low mountain forest is defined as tree-covered areas within the mountain boundary, with a tree height between 2 - 5 meters and a canopy cover of at least 10 percent. The layer shows where low-grown mountain forest is located within the mountainous border. The method is based on laser data and is not classified in satellite image. This means that the layer can contain both alpine birch and alpine coniferous forests, willow shrubs and shrubs/trees on ‘very old clearcuts’ that are 2-5 metres high with 10% canopy cover. The area in the mountainous border also contains valleys and other lowlands, which means that low forest on more productive land is included, e.g. clearings.低山森林（Low mountain forest）定义为山地边界内的林木覆盖区域，林木高度介于2米至5米之间，郁闭度不低于10%。 本图层展示了山地边界内低生山地森林的分布位置。该数据集的生成基于激光数据，未依托卫星影像开展分类工作。 这意味着本图层可涵盖高山桦木林、高山针叶林、柳灌丛，以及高度介于2至5米、郁闭度达10%的“极老皆伐迹地”上的灌丛或林木。 山地边界覆盖的区域同时包含河谷与其他低地，这意味着立地条件更优的土地上的低林也被纳入本数据集，例如采伐迹地。