Results 11 to 20 of about 2,045,190 (230)
Airborne laser scanning and usefulness for hydrological models [PDF]
Advances in Geosciences, 2005 Digital terrain models form the basis for distributed hydrologic models as well as for two-dimensional hydraulic river flood models. The technique used for generating high accuracy digital terrain models has shifted from stereoscopic aerial-photography ...
M. Hollaus, W. Wagner, K. Kraus
doaj +3 more sources
Advances in Forest Inventory Using Airborne Laser Scanning [PDF]
Remote Sensing, 2012 We present two improvements for laser-based forest inventory. The first improvement is based on using last pulse data for tree detection. When trees overlap, the surface model between the trees corresponding to the first pulse stays high, whereas the ...
Hannu Hyyppä +10 more
doaj +8 more sources
Test field for airborne laser scanning in Finland [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014 Airborne laser scanning (ALS) is a widely spread operational measurement tool for obtaining 3D coordinates of the ground surface. There is a need for calibrating the ALS system and a test field for ALS was established at the end of 2013.
E. Ahokas +3 more
doaj +4 more sources
Detecting Terrain Stoniness From Airborne Laser Scanning Data †
Remote Sensing, 2016 Three methods to estimate the presence of ground surface stones from publicly available Airborne Laser Scanning (ALS) point clouds are presented. The first method approximates the local curvature by local linear multi-scale fitting, and the second method
Paavo Nevalainen +4 more
doaj +3 more sources
Estimation of 3D vegetation structure from waveform and discrete return airborne laser scanning data [PDF]
, 2012 This study presents and compares new methods to describe the 3D canopy structure with Airborne Laser Scanning (ALS) waveform data as well as ALS point data.
Olofsson, Kenneth, +12 more
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Estimation of tree lists from airborne laser scanning by combining single-tree and area-based methods [PDF]
, 2010 Individual tree crown segmentation from airborne laser scanning (ALS) data often fails to detect all trees depending on the forest structure. This paper presents a new method to produce tree lists consistent with unbiased estimates at area level.
Olofsson, Kenneth +4 more
core +1 more source
Estimation of stem attributes using a combination of terrestrial and airborne laser scanning [PDF]
, 2012 Properties of individual trees can be estimated from airborne laser scanning (ALS) data provided that the scanning is dense enough and the positions of field-measured trees are available as training data.
Olofsson, Kenneth +3 more
core +1 more source
Revista de Teledetección, 2020 This PhD thesis addresses the development of full-waveform airborne laser scanning (ALSFW) processing and analysis methods to characterize the vertical forest structure, in particular the understory vegetation.
P. Crespo-Peremarch, L. A. Ruiz
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COMPARISON OF SOFTWARE FOR AIRBORNE LASER SCANNING DATA PROCESSING IN SMART CITY APPLICATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019 Problems of processing of point clouds of airborne laser scanning using different software for Smart City projects are considered. Results of comparison of suitable software on the base of a test point cloud are presented.
V. Badenko +4 more
doaj +1 more source
New Advances in Automated Urban Modelling from Airborne Laser Scanning Data [PDF]
, 2011 Traditionally, urban models in many applications such as urban planning, disaster management, and computer games only require visual accuracy. However, more recently, updating urban infrastructure combined with the rise of mega-cities (i.e.
Hinks, Tommy +7 more
core +1 more source