Browsing NIBIO Brage by Author "Magnussen, Steen"
Now showing items 1-3 of 3
-
Comparison of estimators of variance for forest inventories with systematic sampling - results from artificial populations
Magnussen, Steen; McRoberts, Ronald E.; Breidenbach, Johannes; Nord-Larsen, Thomas; Ståhl, Göran; Fehrmann, Lutz; Schnell, Sebastian (Peer reviewed; Journal article, 2020-03-23)Background: Large area forest inventories often use regular grids (with a single random start) of sample locations to ensure a uniform sampling intensity across the space of the surveyed populations. A design-unbiased ... -
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 ... -
Use of models in large-area forest surveys: comparing model-assisted, model-based and hybrid estimation
Ståhl, Göran; Saarela, Svetlana; Schnell, Sebastian; Holm, Sören; Breidenbach, Johannes; Healey, Sean P.; Patterson, Paul L.; Magnussen, Steen; Næsset, Erik; McRoberts, Ronald E.; Gregoire, Timothy G. (Journal article; Peer reviewed, 2016)This paper focuses on the use of models for increasing the precision of estimators in large-area forest surveys. It is motivated by the increasing availability of remotely sensed data, which facilitates the development of ...