首页> 外文会议>Asian conference on remote sensing;ACRS >ABOVEGROUND BIOMASS ESTIMATION USING AIRBORNE LASER SCANNING (ALS) AND STRUCTURE FROM MOTION (SFM) IN TROPICAL MONTANE FOREST, NORTHERN BORNEO
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ABOVEGROUND BIOMASS ESTIMATION USING AIRBORNE LASER SCANNING (ALS) AND STRUCTURE FROM MOTION (SFM) IN TROPICAL MONTANE FOREST, NORTHERN BORNEO

机译:利用北部航空热带森林的空中激光扫描(ALS)和运动结构(SFM)估算生物量

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The advancement technology of airborne laser scanning (ALS) and structure from motion (SfM) offer high capability in forest assessment such as aboveground biomass (AGB) estimation. In this study, we compared the capability of ALS and SfM datasets in estimating AGB for tropical montane forest, North Borneo. ALS and SfM datasets were acquired using Riegl-LMS Q560 sensor and digital single lens reflex (DSLR) camera of Canon 1D Mark III, respectively. SfM dataset was derived by processing the aerial photographs using Agisoft PhotoScan Pro software. We used 45 plots collected in the field and the predictor variables derived from ALS and SfM datasets to develop the AGB models by using multiplicative linear regression. Relative mean square error (RMSE) was found slightly lower in AGB estimation using ALS dataset (RMSE=89.38 Mg/ha; RMSE%=32.41%; R~2=0.7923) compared to SfM dataset (RMSE=96.75 Mg/ha; RMSE%=35.09%; R~2=0.7442) with the value of 2.68%. The result demonstrated that SfM dataset can be utilized for AGB estimation given the availability of aerial photographs and digital terrain model (DTM) derived from ALS.
机译:机载激光扫描(ALS)和运动结构(SfM)的先进技术在森林评估(例如地上生物量(AGB)估计)方面提供了强大的功能。在这项研究中,我们比较了ALS和SfM数据集估算北婆罗洲热带山地森林AGB的能力。分别使用Riegl-LMS Q560传感器和佳能1D Mark III的数字单镜反光(DSLR)相机获取ALS和SfM数据集。 SfM数据集是通过使用Agisoft PhotoScan Pro软件处理航拍照片而得出的。我们使用了现场收集的45个图以及从ALS和SfM数据集获得的预测变量,通过使用乘法线性回归来开发AGB模型。与SfM数据集(RMSE = 96.75 Mg / ha; RMSE)相比,使用ALS数据集(RMSE = 89.38 Mg / ha; RMSE%= 32.41%; R〜2 = 0.7923)在AGB估计中发现相对均方误差(RMSE)稍低%= 35.09%; R〜2 = 0.7442),值为2.68%。结果表明,鉴于航空照片和从ALS导出的数字地形模型(DTM)的可用性,SfM数据集可用于AGB估计。

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