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Combining ALS and NFI training data for forest management planning: a case study in Kuortane, Western Finland

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Abstract

Forest inventories based on airborne laser scanning (ALS) have already become common practice in the Nordic countries. One possibility for improving their cost effectiveness is to use existing field data sets as training data. One alternative in Finland would be the use of National Forest Inventory (NFI) sample plots, which are truncated angle count (relascope) plots. This possibility is tested here by using a training data set based on measurements similar to the Finnish NFI. Tree species-specific stand attributes were predicted by the non-parametric k most similar neighbour (k-MSN) approach, utilising both ALS and aerial photograph data. The stand attributes considered were volume, basal area, stem number, mean age of the tree stock, diameter and height of the basal area median tree, determined separately for Scots pine, Norway spruce and deciduous trees. The results obtained were compared with those obtained when using training data based on observations from fixed area plots with the same centre point location as the NFI plots. The results indicated that the accuracy of the estimates of stand attributes derived by using NFI training data was close to that of the fixed area plot training data but that the NFI sampling scheme and the georeferencing of the plots can cause problems in practical applications.

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Authors and Affiliations

  1. Faculty of Forest Sciences, University of Joensuu, P.O. Box 111, 80101, Joensuu, Finland

    M. Maltamo, P. Packalén, A. Suvanto & L. Mehtätalo

  2. Finnish Forest Research Institute, Joensuu Research Centre, P.O. Box 68, 80101, Joensuu, Finland

    K. T. Korhonen & P. Hyvönen

Authors
  1. M. Maltamo
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  2. P. Packalén
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  3. A. Suvanto
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  4. K. T. Korhonen
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  5. L. Mehtätalo
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  6. P. Hyvönen
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Correspondence to M. Maltamo.

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Communicated by K. Puettmann.

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Maltamo, M., Packalén, P., Suvanto, A. et al. Combining ALS and NFI training data for forest management planning: a case study in Kuortane, Western Finland. Eur J Forest Res 128, 305–317 (2009). https://doi.org/10.1007/s10342-009-0266-6

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  • DOI: https://doi.org/10.1007/s10342-009-0266-6

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