论文标题
基于机载激光扫描的木材体积估算 - 比较国家森林库存和森林管理库存数据的使用
Timber Volume Estimation Based on Airborne Laser Scanning -- Comparing the Use of National Forest Inventory and Forest Management Inventory Data
论文作者
论文摘要
基于国家森林库存（NFI）数据和机载激光扫描的大规模森林资源图可能会促进NFIS与森林管理库存（FMIS）之间的协同作用。对这种基于NFI的地图和FMI的模型的比较表明，基于NFI的地图可以直接用于FMI中，以估计成熟云杉森林的木材体积。传统上，FMI和NFI是单独的活动。详细的基于NFI的森林资源图的可用性增加提供了消除或减少FMI中现场样本图测量的可能性，如果其准确性相似。我们的目的是1）比较基于NFI的地图和FMI中使用的模型中使用的木材体积模型，以及2）在基于NFI的MAP的模型中使用其他局部样品图评估。使用现有基于NFI的MAP和FMI的模型进行木材体积估算的精确估计，并在图和架位级别进行了比较。与FMI相比，基于NFI的映射的估计值类似于或更准确。在建模数据中添加局部图并不能清楚地改善基于NFI的MAP的模型。比较表明，基于NFI的地图可以直接用于FMI中，以用于成熟的云杉架中的木材体积估计，从而节省了大量成本。
Large-scale forest resource maps based on national forest inventory (NFI) data and airborne laser scanning may facilitate synergies between NFIs and forest management inventories (FMIs). A comparison of models used in such a NFI-based map and a FMI indicate that NFI-based maps can directly be used in FMIs to estimate timber volume of mature spruce forests. Traditionally, FMIs and NFIs have been separate activities. The increasing availability of detailed NFI-based forest resource maps provides the possibility to eliminate or reduce the need of field sample plot measurements in FMIs if their accuracy is similar. We aim to 1) compare a timber volume model used in a NFI-based map and models used in a FMI, and 2) evaluate utilizing additional local sample plots in the model of the NFI-based map. Accuracies of timber volume estimates using models from an existing NFI-based map and a FMI were compared at plot and stand level. Estimates from the NFI-based map were similar to or more accurate than the FMI. The addition of local plots to the modeling data did not clearly improve the model of the NFI-based map.The comparison indicates that NFI-based maps can directly be used in FMIs for timber volume estimation in mature spruce stands, leading to potentially large cost savings.
