Full text of this article is only available in PDF format.

Bianca N. I. Eskelson (email), Tara M. Barrett, Hailemariam Temesgen

Imputing mean annual change to estimate current forest attributes

Eskelson B. N. I., Barrett T. M., Temesgen H. (2009). Imputing mean annual change to estimate current forest attributes. Silva Fennica vol. 43 no. 4 article id 185. https://doi.org/10.14214/sf.185

Abstract

When a temporal trend in forest conditions is present, standard estimates from paneled forest inventories can be biased. Thus methods that use more recent remote sensing data to improve estimates are desired. Paneled inventory data from national forests in Oregon and Washington, U.S.A., were used to explore three nearest neighbor imputation methods to estimate mean annual change of four forest attributes (basal area/ha, stems/ha, volume/ha, biomass/ha). The randomForest imputation method outperformed the other imputation approaches in terms of root mean square error. The imputed mean annual change was used to project all panels to a common point in time by multiplying the mean annual change with the length of the growth period between measurements and adding the change estimate to the previously observed measurements of the four forest attributes. The resulting estimates of the mean of the forest attributes at the current point in time outperformed the estimates obtained from the national standard estimator.

Keywords
forest inventory and analysis; forest monitoring; national forest inventories; nearest neighbor imputation; Pacific Northwest; paneled inventory data

Author Info (View)

Received 22 December 2008 Accepted 29 June 2009 Published 31 December 2009

Views 7261

Available at https://doi.org/10.14214/sf.185 | Download PDF

Creative Commons License CC BY-SA 4.0

Click this link to register to Silva Fennica.
If you are a registered user, log in to save your selected articles for later access.
Sign up to receive alerts of new content

Your selected articles
Your search results
Eskelson B. N. I., Barrett T. M. et al. (2009) Imputing mean annual change to estimate current .. Silva Fennica vol. 43 no. 4 article id 185
Temesgen H., Barrett T. M. et al. (2008) Estimating cavity tree abundance using Nearest N.. Silva Fennica vol. 42 no. 3 article id 241