02173naa a2200301 a 450000100080000000500110000800800410001910000150006024501280007526000090020352012880021265000230150065000190152365000110154265000250155365000110157865300190158965300180160865300270162665300270165365300300168065300160171070000230172670000200174970000200176970000170178977300650180620071272015-01-29       2014    bl uuuu     u00u1 u    #d1 aMULLER, M.  aInfluence of flight configuration used for lidar data collection on individual trees data extraction in forest plantations.  c2014  aIn the last decades, several studies havebeen conducted aiming to the extraction of forest variables from LiDAR data. Although such studies have indicated great potential, the high cost associated with LiDAR data acquisition process inhibits the technology to become an operational technique for forestry applications. The cost of a LiDAR survey, as for any other data collection techniques, is composed offixed and variable costs. The variable portion, which can be optimized, is dependent, among other factors, on the number of flight hours. The flight time is mainly dependent on the flight configuration used for the survey. The objective of this paper is to investigate the impact of using different operational parameters on different species of forest plantations, to provide inputs for an adequate cost-benefit analysis. The different configurations are evaluated in terms of the number of individual trees automatically detected, individual height and volume, using the forest inventory as the reference data. The experiments have shown that compatible results are obtained using different configurations with flight time varying by a factor of 3.5 to 10 times. Also, for a given point density, preference should be given to the configuration based on a lower flying height.  aforest mensuration  aremote sensing  aAltura  aSensoriamento Remoto  aVolume  aAirborne LiDAR  aLaser scanner  aOperational parameters  aParâmetro operacional  aProgressive densification  aTree height1 aKERSTING, A. P. B.1 aNAKAJIMA, N. Y.1 aHOSOKAWA, R. T.1 aROSOT, N. C.  tFloresta, Curitibagv. 44, n. 2, p. 279-290, abr./jun. 2014.