A two-phase inventory method for calculating standing volume and tree-density of forest stands in central Poland based on airborne laser-scanning data

Stanisław Miścicki 1  and Krzysztof Stereńczak 2
  • 1 Warsaw University Of Life Sciences–SGGW, Department of Forest Management Planning, Geomatics and Forest Economics, ul. Nowoursynowska 159, 02-776 Warszawa, Poland
  • 2 Forest Research Institute, Department of Information Technology and Modelling, Sękocin Stary, ul. Braci Leśnej, 05-090 Raszyn, Poland Tel. +48 22 7150325, fax. +48 22 7200397

Abstract

This paper describes a method of determining the stocking density and volume of forest stands based on airborne laser-scanning data. The aim of this study was to determine the relationship between ground-based measurements of standing volume and tree-density, and those acquired based on the Crown Height Model (CHM) interpolated from airborne laser scanning data. Data were collected from 34 sample plots of two sizes for the CHM analysis: 500 m2 (radius 12.61 m) and 1963.5 m2 (radius of 25.0 m): Trees for sampling were selected using two methods, those whose “centroid” was fully within the sample plot (the tree was considered to be within the sample plots if the centroid of the crown was inside the circle) and those at the “border” (the tree was included in the sample plot if, at least, one part of the contour of the crown was inside the circle). There was a strong relationship (R2 = 0.86) between standing volume measured in sample plots on the ground and the indices produced by the crown elevation model at the locations where the ground-based measurements were performed.

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