Browsing Vitenskapelige artikler by Author "Rahlf, Johannes"
Now showing items 1-6 of 6
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An operational UAV-based approach for stand-level assessment of soil disturbance after forest harvesting
Talbot, Bruce; Rahlf, Johannes; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018-01-16)The effectiveness of generating virtual transects on unmanned aerial vehicle-derived orthomosaics was evaluated in estimating the extent of soil disturbance by severity class. Combinations of 4 transect lengths (5–50 m) ... -
Forest Parameter Prediction Using an Image-Based Point Cloud: A Comparison of Semi-ITC with ABA
Rahlf, Johannes; Breidenbach, Johannes; Solberg, Svein; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2015)Image-based point clouds obtained using aerial photogrammetry share many characteristics with point clouds obtained by airborne laser scanning (ALS). Two approaches have been used to predict forest parameters from ALS: the ... -
Large scale mapping of forest attributes using heterogeneous sets of airborne laser scanning and National Forest Inventory data
Hauglin, Marius; Rahlf, Johannes; Schumacher, Johannes; Astrup, Rasmus Andreas; Breidenbach, Johannes (Peer reviewed; Journal article, 2021-09-29)Background The Norwegian forest resource map (SR16) maps forest attributes by combining national forest inventory (NFI), airborne laser scanning (ALS) and other remotely sensed data. While the ALS data were acquired over ... -
Modelling above-ground biomass stock over Norway using national forest inventory data with ArcticDEM and Sentinel-2 data
Puliti, Stefano; Hauglin, Marius; Breidenbach, Johannes; Montesano, P.; Neigh, C.S.R.; Rahlf, Johannes; Solberg, Svein; Klingenberg, T. F.; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2019-11-07)Boreal forests constitute a large portion of the global forest area, yet they are undersampled through field surveys, and only a few remotely sensed data sources provide structural information wall-to-wall throughout the ... -
Timber volume estimation based on airborne laser scanning — comparing the use of national forest inventory and forest management inventory data
Rahlf, Johannes; Hauglin, Marius; Astrup, Rasmus Andreas; Breidenbach, Johannes (Peer reviewed; Journal article, 2021-05-17)Key message 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 ... -
Unit-level and area-level small area estimation under heteroscedasticity using digital aerial photogrammetry data
Breidenbach, Johannes; Magnussen, Steen; Rahlf, Johannes; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018)In many applications, estimates are required for small sub-populations with so few (or no) sample plots that direct estimators that do not utilize auxiliary variables (e.g. remotely sensed data) are not applicable or result ...