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Economic utility of 3D remote sensing data for estimation of site index in Nordic commercial forest inventories: a comparison of airborne laser scanning, digital aerial photogrammetry and conventional practices
Scandinavian Journal of Forest Research ( IF 1.8 ) Pub Date : 2020-12-08 , DOI: 10.1080/02827581.2020.1854340
Lennart Noordermeer 1 , Terje Gobakken 1 , Erik Næsset 1 , Ole Martin Bollandsås 1
Affiliation  

ABSTRACT Forest productivity is a crucial variable in forest planning, usually expressed as site index (SI). In Nordic commercial forest inventories, SI is commonly estimated by a combination of aerial image interpretation, field assessment and information obtained from previous inventories. Airborne laser scanning (ALS) and digital aerial photogrammetry (DAP) data can alternatively be used for SI estimation, however the economic utilities of the inventory methods have not been compared. We compared seven methods of SI estimation in a cost-plus-loss analysis, by which we added the expected economic losses due to sub-optimal treatment decisions to the inventory costs. The methods comprised direct and indirect estimation from combinations of ALS, DAP and stand register data, and manual interpretation from aerial imagery supported by field assessment and information from previous inventories (conventional practices). The choice of method had great impact on both the accuracy and the economic value of the produced estimates. Direct methods using bitemporal ALS and DAP data gave the best accuracy and the smallest total cost. DAP was a suitable and low-cost data source for SI estimation. Estimation from single-date ALS and DAP data and age obtained from the stand register provided practical alternatives when applied to even-aged stands.

中文翻译:

3D 遥感数据在北欧商业森林清单中估算场地指数的经济效用:机载激光扫描、数字航空摄影测量和传统做法的比较

摘要 森林生产力是森林规划中的一个关键变量,通常表示为场地指数(SI)。在北欧商业森林清单中,SI 通常是通过结合航空图像解释、实地评估和从先前清单中获得的信息来估计的。机载激光扫描 (ALS) 和数字航空摄影测量 (DAP) 数据也可用于 SI 估计,但尚未比较清查方法的经济效用。我们在成本加损失分析中比较了七种 SI 估计方法,通过这种方法,我们将由于次优处理决策导致的预期经济损失添加到库存成本中。这些方法包括从 ALS、DAP 和林分登记数据的组合中直接和间接估计,以及由实地评估和先前清单信息(传统做法)支持的航拍图像的人工解释。方法的选择对产生的估计的准确性和经济价值都有很大影响。使用双时态 ALS 和 DAP 数据的直接方法提供了最佳的准确性和最小的总成本。DAP 是用于 SI 估计的合适且低成本的数据源。当应用于偶龄林分时,从单日 ALS 和 DAP 数据以及从林分登记册中获得的年龄的估计提供了实用的替代方案。DAP 是用于 SI 估计的合适且低成本的数据源。从单日 ALS 和 DAP 数据以及从林分登记册中获得的树龄的估计在应用于偶龄林分时提供了实用的替代方案。DAP 是用于 SI 估计的合适且低成本的数据源。当应用于偶龄林分时,从单日 ALS 和 DAP 数据以及从林分登记册中获得的年龄的估计提供了实用的替代方案。
更新日期:2020-12-08
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