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Title: Accuracy of a high-resolution lidar terrain model under a conifer forest canopy

Author: Reutebuch, S.E.; McGaughey, R.J.; Andersen, H.-E.; Carson, W.W.;

Date: 2003

Source: Canadian Journal of Remote Sensing. 29(5): 527-535.

Publication Series: Scientific Journal (JRNL)

Description: Airborne laser scanning systems can provide terrain elevation data for open areas with a vertical accuracy of 15 cm. In this study, a high-resolution digital terrain model (DTM) was produced from high-density lidar data. Vegetation in the 500-ha mountainous study area varied from bare ground to dense 70-year-old conifer forest. Conventional ground survey methods were used to collect coordinates and near-ground vegetation heights at 347 ground checkpoints distributed under a range of canopy covers. These points were used to check the DTM accuracy. The mean DTM error was 0.22 ± 0.24 m (mean ± SD). DTM elevation errors for four tree canopy cover classes were: clearcut 0.16 ± 0.23 m, heavily thinned 0.18 ± 0.14 m, lightly thinned 0.18 ± 0.18 m, and uncut 0.31 ± 0.29 m. These DTM errors show a slight increase with canopy density but the differences are strikingly small. In general, the lidar DTM was found to be extremely accurate and potentially very useful in forestry.

Keywords: Lidar, digital terrain model, accuracy

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Reutebuch, S.E.; McGaughey, R.J.; Andersen, H.-E.; Carson, W.W. 2003. Accuracy of a high-resolution lidar terrain model under a conifer forest canopy. Canadian Journal of Remote Sensing. 29(5): 527-535.

 


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