The research on the application of laser scanning measurement technology in forestry

In this paper we describe how to improve the workflow in forestry management using the increased capability of today\´s scanner-systems. We developed a new approach for single-tree delineation based on a volumetric analysis in laser-scanner data. The algorithm detects positions and dimensions of individual trees in a forest for use in a 3D-GIS. The measured data can be combined with other measured and statistical data giving the user a detailed view in the forestry units, leading to a database consisting of individual trees-the so called "Virtual Forest". The volumetric approach was adapted to use a combination of aerial photos and 3D laser-scanner data. While positions were only taken from the better resolved true-orthophotos dimensions and especially height-information are based on the 3D-data.The volumetric approach was implemented into a 3D-GIS and successfully tested using recorded data from a 150 km² test-area.