However, because of the restrict of resolution, forest quantitative research concentrated primarily on forest stock volume estimation, while few research on forest land survey factors estimation such as mean diameter, mean tree height and so on.
但是，由于遥感分辨率的限制，森林遥感定量研究主要集中在森林蓄积量的估测研究，而对平均直径、平均树高等林分调查因子的估测研究的不多。
参考来源 - 基于IKONOS影像和DGPS技术的森林调查因子估测方法研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Between 2003 and 2008, China's forest coverage registered a net increase of 20.54 million hectares and forest stock volume rose by 1.123 billion cubic meters.
2003至2008年，森林面积净增2054万公顷，森林蓄积量净增11.23亿立方米。
Based on the comprehensiveness of forest coverage rate, total standing forest stock, average forest volume, a new indicator called 'Forest Thickness'(FT) is put forward in this paper.
本文在综合森林覆盖率、活立木蓄积量、单位面积森林蓄积量等传统林业评价指标的基础上，研究提出了一项新的指标——森林厚度。
It also shows low unit stock volume, unreasonable forest age structure, low forestland use ratio and severe pest, disease and rat disaster.
该流域森林资源有限且分布不均；单位蓄积量低，林龄结构不合理；林地利用率不高，病虫鼠害严重。
应用推荐