Cut-off importance sampling of bole volume

Andrew Robinson, Timothy Gregoire, Harry Valentine
1997 Silva Fennica  
Valentine, H.T. 1997. Cut-off importance sampling of bole volume. Silva Fennica 31(2): 153-160. Cut-off importance sampling (CIS) is introduced as a means of sampling individual trees for the purpose of estimating bole volume. The novel feature of this variant of importance sampling is the establishment on the bole of a cut-off height, He, above which sampling is precluded. An estimator of bole volume between predetermined heights Hi and Hu > H c is proposed, and its design-based bias and mean
more » ... quare error are derived. In an application of CIS as the second stage of a two-stage sample to estimate aggregate bole volume, the gain in precision realized from CIS more than offset its bias when compared to the precision of importance sampling when He = HJJ.
doi:10.14214/sf.a8516 fatcat:js7ijelbw5e7zks3whrystr7pe